Look, I get it. Sometimes you’re in a bind. The key is lost, the ignition cylinder is shot, and your pride and joy, that magnificent 1990 Cadillac DeVille, is sitting there like a land yacht waiting for orders. You’re staring at the steering column, a screwdriver in your hand, and that age-old question pops into your head: can you use a screwdriver to start a 90 Cadillac DeVille?
It’s a classic move you’ve probably seen in movies or heard whispered about by your gearhead buddies. The idea of bypassing the key altogether. It’s tempting, I know. But before you go jamming metal into your car’s sensitive innards, let’s talk about what’s really going on and if it’s worth the hassle.
The Nitty-Gritty: How Ignition Systems Actually Work
Alright, let’s get down to brass tacks. Your car’s ignition system isn’t just some magic switch. For a 1990 Cadillac DeVille, it’s a fairly straightforward electrical circuit, but one that’s designed to be activated by a specific key. When you put the key in and turn it, you’re basically closing a series of electrical contacts. The first click usually powers up the accessories – radio, power windows, all that jazz. The second click (the ‘start’ position) sends power to the starter motor solenoid, which then engages the starter to crank the engine.
Underneath the steering column, behind that plastic shroud, there’s a part called the ignition switch. The key cylinder actually rotates a cam or a lever that manipulates this ignition switch. So, if you’re thinking about using a screwdriver, you’re basically trying to manually move that cam or lever to mimic what the key does. It’s not about finding a spark in the engine bay with the screwdriver; it’s about fooling the car into thinking the key has been turned correctly.
For a car like a ’90 DeVille, which predates most of the complex anti-theft systems you find in modern vehicles, this direct mechanical bypass is more feasible than it would be on something newer. You’re dealing with simpler electrical pathways. The main components you’re trying to interact with are the ignition switch itself and, if you’re going full hotwire mode, the starter solenoid. It’s a mechanical puzzle, really, but one with electrical consequences. The common advice you’ll find online often simplifies this, but understanding the flow of power is key to even attempting it without frying something expensive.
The challenge isn’t just getting it to crank; it’s getting it to crank and stay running. The ignition switch has multiple positions: ‘Off’, ‘Accessory’, ‘On’ (or ‘Run’), and ‘Start’.
You need to engage the ‘On’ position to power the fuel pump and ignition system for the engine to actually run after it’s started. Just hitting the starter will only make it crank. So, a screwdriver isn’t just a magic wand; it’s a tool to manually flip these electrical switches.
I remember one time, trying to help a friend whose ignition switch was completely seized on an older Ford. We spent about an hour trying to jimmy it with a screwdriver, thinking we were being clever. We managed to get it to crank, but it just wouldn’t stay on because we couldn’t get the ‘On’ position to stay engaged. Ended up costing him more in frustration and a tow than if he’d just waited for a locksmith.
Why It’s a Bad Idea (most of the Time)
Let’s be blunt: while the theoretical answer to can you use a screwdriver to start a 90 Cadillac DeVille is ‘yes, sometimes,’ it’s a terrible idea for about 99% of situations. You’re looking at a car that’s over 30 years old. The wiring harness might be brittle, the plastic steering column covers are probably cracked or warped, and the ignition switch itself is a delicate assembly. Jamming a screwdriver in there isn’t just crude; it’s like trying to perform surgery with a sledgehammer.
The biggest risk is damaging the ignition switch itself. These aren’t particularly solid components, and forcing them can bend or break internal contacts. If you damage it, you’ve gone from a potentially fixable problem to a guaranteed repair bill. You might also short out electrical components. The steering column in a ’90 DeVille has a lot going on – ignition, steering lock mechanism, turn signal switch, wiper controls. A misplaced screwdriver can easily bridge contacts it shouldn’t, leading to blown fuses, fried relays, or worse, damage to the car’s computer module if it has one. For a ’90 model, it’s less likely to have a complex ECU that’s easily fried by a simple short, but there are still sensitive circuits. (See Also: Do Deck Mate Screws Need A Pilot Hole )
Then there’s the steering lock. Most cars of this era have a mechanical steering lock that engages when the key is removed and the wheel is turned slightly. Trying to bypass the ignition with a screwdriver often means you’re also trying to defeat this lock, which is a separate mechanism. Forcing it can break the lock pin, leaving your steering wheel loose and potentially unusable, or even stuck in the locked position. That’s a whole other level of ‘oops’.
Honestly, I once saw a guy try this on a car that looked similar to a DeVille. He was determined, and he managed to get it to crank. But in the process, he mangled the steering column plastic so badly that it looked like a beaver had been at it.
The ignition switch was a mess, and he also managed to short out the radio, which then started making this high-pitched whine that wouldn’t stop, even when the car was off. He spent more time trying to fix the mess he made than he would have spent waiting for a tow truck and a proper repair. It’s a classic ‘penny wise, pound foolish’ scenario.
The few bucks you might save on a tow are nothing compared to the potential damage.
What to Look for If You’re Really Stuck
Okay, so if you’re in a dire situation and wondering, ‘Can you use a screwdriver to start a 90 Cadillac DeVille?’ and you’re absolutely desperate, you need to know what you’re actually trying to manipulate. It’s not just about sticking the screwdriver in and hoping for the best. You’ll likely need to remove the plastic steering column covers first. This usually involves a few Phillips head screws. Once those are off, you’ll see the ignition switch assembly and the ignition cylinder where the key goes.
The goal is to manually turn the shaft that the ignition cylinder normally rotates. This shaft has multiple positions corresponding to the key positions. You’re looking for the ‘On’ position (which powers the car’s systems) and the ‘Start’ position (which engages the starter motor). Often, you can see a small lever or a metal tab on the back of the ignition cylinder that you can push or turn with a flathead screwdriver. You’ll need to turn it to the ‘On’ position and then momentarily push it further to the ‘Start’ position. Once the engine fires up, you need to release it back to the ‘On’ position; otherwise, you’ll grind the starter motor, which is a surefire way to destroy it.
The challenge is the feel. You need to feel for the detents or the slight resistance that indicates you’ve hit the ‘On’ position. Then, you need to push past that to the ‘Start’ position. It’s tricky because without the key as a guide, you’re working blind. You might overshoot, undershoot, or get stuck between positions. Some people have had success by removing the ignition cylinder entirely and using a screwdriver to turn the shaft it leaves behind. This can give you a bit more use and a clearer view of the mechanism.
When I was much younger, and frankly, stupider, I tried this on a beat-up old pickup. I’d lost the key and was in a hurry. I managed to get the column covers off and saw the ignition switch. I used a flathead screwdriver, and it took me about 20 minutes of fiddling.
I’d get it to crank, but not catch. Then I’d accidentally turn it too far and hear that awful grinding sound. (See Also: Do Nvme Drives Come With Screws )
Finally, I got it to turn over and stay running. The car smelled like burnt plastic for weeks, and the steering wheel felt a bit loose afterward. It worked, but it was a stressful, messy experience.
It’s not a ‘cool’ trick; it’s a last resort that often causes more damage than it solves.
Common Mistakes and What Happens Next
The most common mistake people make when attempting to bypass an ignition with a screwdriver is the brute force approach. They jam the screwdriver in and twist like they’re trying to open a stubborn jar. This is how you break things. The ignition switch and cylinder are designed for precise movement with the correct key. Forcing them can shear off internal pins, bend the actuator rod, or crack the plastic housing. You’re not just trying to turn something; you’re trying to activate specific electrical contacts in a sequence.
Another huge mistake is forgetting about the steering lock. If your steering wheel is locked, you can turn the ignition all you want, but the steering column won’t budge. Trying to force the steering wheel while also trying to crank the engine can put immense stress on the ignition lock mechanism, leading to breakage. It’s a compounding problem. Most people who try this don’t even consider the steering lock until they’ve already broken something else.
What happens next? Well, if you’re lucky, you might get the car started, but it’s often a temporary fix. The ignition switch might be damaged, leading to intermittent starting issues, electrical gremlins, or the car cutting out while you’re driving. The plastic shroud around the steering column will likely be in pieces, making it look like a salvage yard reject. In the worst-case scenario, you’ve fried the ignition switch, the steering lock mechanism, or even some of the car’s electrical modules. This turns a simple key replacement job into a much more expensive repair, potentially costing hundreds or even thousands of dollars to fix the collateral damage.
I had a buddy who was convinced he could hotwire his old Honda Civic. He spent an entire Saturday messing with the ignition and wires under the dash. He eventually got it started, but the car would only run for about five minutes before sputtering out. Turns out, in his ‘expert’ work, he’d accidentally disconnected or damaged the fuel pump relay wire. So, it would start on residual fuel in the lines, but then die. He kept trying to restart it, which only further stressed the starter. He ended up having to get it towed, and the mechanic charged him extra to clean up the mess of wires he’d created under the dash before fixing the actual problem.
| Method | Pros | Cons | Verdict |
|---|---|---|---|
| Screwdriver Bypass | Potentially starts car in a pinch. | High risk of damage to ignition switch, steering column, and electrical system. Looks terrible. May not work. | Last resort; generally not recommended. |
| Ignition Key Replacement | Correct, safe, and reliable method. Restores full functionality. | Requires a new key and possibly a new ignition cylinder/switch. Costs money. | The right way to do it. |
| Professional Locksmith/Mechanic | Expert diagnosis and repair. Guarantees proper function. No damage. | Most expensive option upfront. | Best option for peace of mind and avoiding further damage. |
Real-World Use Cases & Practical Tips
So, when, if ever, is the screwdriver method even remotely justifiable for a 1990 Cadillac DeVille? Honestly, it’s a scenario so niche it’s barely worth discussing. Perhaps if you’re stranded in a remote area with no cell service, no tow trucks available for days, and you absolutely, positively need to move the vehicle a short distance to a slightly safer location, and you’re willing to accept the high risk of permanent damage. Even then, I’d hesitate.
If you find yourself in this absolute emergency, here are a few things to keep in mind, though I still can’t stress enough how much you shouldn’t do this unless your hair is literally on fire: First, disconnect the battery before you start poking around. This minimizes the risk of electrical shorts while you’re trying to figure things out. Second, use the right tool. A sturdy, flathead screwdriver with a comfortable grip is better than a flimsy one.
You want use and control. Third, try to identify the ignition switch actuator rod or shaft. (See Also: Does Showing Screw Driver Into The Ignition )
You’re looking for something that moves when the key cylinder turns. Gentle pressure is key – feel for the resistance of the ‘On’ and ‘Start’ positions, don’t just jam it in and force it.
The reality is, for a ’90 Cadillac DeVille, if your key is lost or the ignition cylinder is broken, the most practical solution is to call a locksmith who specializes in automotive locks. They can cut a new key from the VIN or replace the ignition cylinder. It might cost you a couple of hundred bucks, but it’s guaranteed to work and won’t destroy your car’s electrical system or steering column.
I’ve heard stories, and even experienced myself, the frustration of a seized ignition cylinder. My own uncle had a classic Mercedes that sat for years because the ignition key broke off inside the cylinder, and he was too scared to damage the vintage parts. He eventually broke down and called a specialist. It took them half a day, but they got it sorted without turning the car into a junkyard special.
If the ignition switch itself is failing (meaning the key turns but nothing happens), that’s a different issue. You might be able to get it started by wiggling the key or jiggling the steering wheel. But if it’s truly dead, replacement is the only real fix. For a ’90 DeVille, these parts are still readily available and not astronomically expensive compared to newer luxury cars. So, while the question ‘can you use a screwdriver to start a 90 Cadillac DeVille?’ has a technical ‘yes’ answer in extreme, desperate circumstances, the practical, common-sense answer is a resounding ‘no, don’t do it’.
Will Using a Screwdriver Damage My 1990 Cadillac Deville’s Ignition?
Yes, almost certainly. Using a screwdriver to bypass the ignition is a crude method that can easily damage the internal components of the ignition switch and cylinder. You risk bending or breaking the actuator rod, cracking the plastic housing, or damaging electrical contacts, leading to further problems that are more expensive to fix than replacing the key or ignition cylinder.
Is It Legal to Start a Car with a Screwdriver?
While starting your own car with a screwdriver in a private place to move it in an emergency isn’t typically a criminal offense, it is often associated with illegal activities like car theft. If you are caught doing this on someone else’s property or in a public place without a legitimate reason, you could face suspicion and questioning. It’s also a good way to void any insurance claims if something goes wrong.
What’s the Easiest Way to Start a 1990 Cadillac Deville Without a Key?
The easiest and safest way to start a 1990 Cadillac DeVille without a key is to have a replacement key made by a qualified automotive locksmith. They can cut a new key from your vehicle’s VIN or by decoding the existing lock cylinder. Attempting to bypass the ignition with tools like a screwdriver is difficult, risky, and highly likely to cause damage to the vehicle’s electrical and steering systems.
How Do I Replace the Ignition Switch on a 1990 Cadillac Deville?
Replacing the ignition switch on a 1990 Cadillac DeVille typically involves removing the steering column covers, disconnecting the electrical connector from the ignition switch, and then removing the switch itself, which is usually held in place by screws or a retaining clip. You’ll need to turn the ignition cylinder to the ‘Accessory’ or ‘On’ position to align a release pin or slot, allowing the old switch to be removed and the new one to be installed. It’s a job that requires some mechanical aptitude and the right tools.
Final Thoughts
So, to finally put it to rest: can you use a screwdriver to start a 90 Cadillac DeVille? Technically, under extreme duress and with a high probability of causing significant damage, you might be able to get it to crank. But that’s not the same as successfully starting and driving your car.
The risks of wrecking the ignition switch, the steering column, or the car’s delicate electrical system far outweigh any perceived benefit of trying this hack. You’ll likely spend more on repairs than you would have by simply calling a professional locksmith to get a proper key made or the ignition cylinder replaced.
Save yourself the headache, the potential for costly damage, and the sheer embarrassment of a mangled steering column. If your key is gone or your ignition is shot, do the smart thing. Find a reputable automotive locksmith or a mechanic. It’s the only way to make sure your beloved ’90 Cadillac DeVille gets back on the road safely and without costing you a fortune in preventable repairs.