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Old 09-13-2007, 01:16 AM   #1
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HOWTO: Clutch Interlock Bypass

For safety sake, clutch based vehicles come with a system that requires you to press the clutch so you can start the vehicle. This is great for normal operation, but not really desireable for offroad. i.e. how many times have you been facing up to the sky, stalled the engine, had to push the clutch to start the engine, and had the rig bounce or roll back when you do?

Here's how to bypass the clutch interlock.

*disclaimer* The notes below are for an '03 TJ. Your rig is likely different...check the owners manual.

According to the owner's manual for my '03 TJ, to bypass the clutch interlock, simply pull the spare 20amp fuse from position 19 in the fuse panel behind the glove box and put it in position 20.


That is it. You are done.

However, I wanted to make it a switchable thing where I didn't have to move fuses and whatnot while stalled on a 132 degree incline.

Here's what you'll need. I picked up my stuff at O'Reilly for just under $8 bux.
- 1 box of 20amp fuses (I didn't have any spares...$2.59)
- 1 mini fuse holder ($1.79)
- 1 red rocker switch ($2.99)
also a couple feet of spare 14guage wire and various connectors

The wiring diagram looks as follows:


So...here we go. The full install should take less than 1/2 an hour...

1. Find a good location to mount your switch. I used one of the available ones above the cig lighter.

2. Make sure the mini fuse holder does not have a fuse in it (you'll add that later)

3. Connect the 'power' lead from the rocker switch to one of poles in position 20 of the fuse box

4. Connect the 'accessory' lead from the rocker switch to the mini fuse holder

5. Connect the other side of the mini fuse holder to the other pole of position 20 in the fuse box


NOTE: don't know if it is the best way, but I purposely blew one of the 20amp fuses and wedged it in place to hold the wires in the fuse box. (let me know if you know of a better way...)


6. Connect the 'ground' lead from the rocker switch to a good ground source (I tapped the cig lighter)

7. Put a 20amp fuse in the mini fuse holder.

8. Test it out:
- pull the e-brake
- make sure you are not in gear
- with the switch in the off position and your foot off the clutch, try to start the vehicle. It should not start. This is the normal operating position.
- turn the switch on, and try again. The Jeep should start.

9. Put everything back together.

Here's the end result for mine:


In case you are curious; the switches are:


There ya go

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Old 09-13-2007, 08:13 AM   #2
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in 97's i know that it is not this, it hnas something to do with wires and bypass wires up under the dash, look in the manual depending on what year you have before you do this

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Old 02-06-2011, 05:38 PM   #3
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The instructions for the 03 is the same for the 04. I have a 04 X 4.0 manual. put spare fuse in and started right up. Now I can keep the wife happy and put in the remote starter. YEA
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Old 03-15-2012, 04:32 PM   #4
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This is dumb, but why wouldnt I be able to view the photos that you have posted for the installation of your clutch override switch. Is there something wrong with my browser, what type of tech problem am I having, I sure would like to be able to see photos on this forum, can anyone help?
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Old 03-15-2012, 04:38 PM   #5
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1997 was the only year you had to move around the switch plugs. All following years were a fuse.

Just leave the fuse in all the time and call it done. I've had the clutch interlock bypassed since day one. I always have the parking brake on so the 1 or 2 times I've accidentally tried to start it in gear it does nothing but rock the jeep forward and inch or two.
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Old 03-15-2012, 05:51 PM   #6
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This is dumb, but why wouldnt I be able to view the photos that you have posted for the installation of your clutch override switch. Is there something wrong with my browser, what type of tech problem am I having, I sure would like to be able to see photos on this forum, can anyone help?
Probably because the pics have been removed from wherever he hosted them 4 1/2 years ago when he posted that..
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Old 03-15-2012, 06:54 PM   #7
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1997 was the only year you had to move around the switch plugs. All following years were a fuse.
Moving a connecter came back in later years. My 2004 makes you move a connector.

I agree on leaving the interlock bypassed. Car and truck clutches never needed interlocks before the lawyers got involved.
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Old 03-15-2012, 07:19 PM   #8
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Moving a connecter came back in later years. My 2004 makes you move a connector.

I agree on leaving the interlock bypassed. Car and truck clutches never needed interlocks before the lawyers got involved.
I can never keep those oddities straight.

Best to just look in the owners manual, it will tell you how to bypass the interlock.
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Old 02-24-2013, 11:23 PM   #9
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Originally Posted by xpertshooter View Post
This is dumb, but why wouldnt I be able to view the photos that you have posted for the installation of your clutch override switch. Is there something wrong with my browser, what type of tech problem am I having, I sure would like to be able to see photos on this forum, can anyone help?
Yeah, my site got nuked and I lost all my files.

Fixed it...hopefully they're all back up.
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Old 11-02-2014, 12:58 PM   #10
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So wat do u have to do to the 97 wranglers
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Old 11-02-2014, 01:41 PM   #11
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So wat do u have to do to the 97 wranglers
You move a cable connector above the driver's side footwell...
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Old 11-02-2014, 02:51 PM   #12
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You could have used the Dome Light Switch Quadratec sells and achieved a similar result.

http://m.quadratec.com/products/prod...?pid=13029+200
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Old 11-02-2014, 04:22 PM   #13
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You could have used the Dome Light Switch Quadratec sells and achieved a similar result.

TJ Dome Light Switch | Jeep Parts and Accessories | Quadratec
Why bother when there's no need to switch back & forth? It is only in recent history that the lawyers forced manufacturers to install things like the clutch interlock switch. Even my mother, her mother, and her mother's mother knew you had to step on the clutch pedal or shift into Neutral before starting the engine. It is only since the lawyers got those interlock switches added where that basic part of driving is no longer learned.
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Old 11-03-2014, 09:29 AM   #14
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I'm aware of that. I was replying to the OP because he made his clutch interlock switched. I bypassed mine the week I bought the Jeep. Been there ever since. Never thought of changing it back.
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Old 11-03-2014, 06:18 PM   #15
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You move a cable connector above the driver's side footwell...
I never knew about this, a few years ago I just cut the wires, twisted them together and wrapped some electrical tape on there.
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Old 11-04-2014, 01:34 PM   #16
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So this allows you to start the jeep in gear? If your facing up as the OP stated wouldn't you have to push the clutch in anyway to start the jeep?
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Old 11-05-2014, 09:59 PM   #17
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still confused on this and why it would be needed, i can start my manual in neutral without pushing in the clutch. so am i able to start it in gear on an incline?
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Old 11-06-2014, 01:10 AM   #18
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still confused on this and why it would be needed, i can start my manual in neutral without pushing in the clutch. so am i able to start it in gear on an incline?
The most "common" reason is if you stall in deep mud or during a water crossing. You don't want to open up the clutch while buried in muck. But you can easily get started again in 4L/1st gear.
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Old 11-07-2014, 08:03 AM   #19
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I moved the the plugs but it still won't let it start still acting as if the clutch was not pressed in and won't start. Deff need to get it fixed I miss driving it

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