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post #1 of 23 (permalink) Old 06-16-2019, 04:27 PM Thread Starter
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Limp home Tundra

Hello everyone. I am literally stuck on my tundra I don't know what to do. I wired a front camera a few months ago and since then I've been stuck. I used a drill bit to make a hole so I can take the wire from the engine to the cabin. (The same where the engine harness comes in from) after that I disconnected the accelerator pedal plug to wrap the wire around it, plugged it back in, wired the camera to the headunit started the truck, pressed the pedal when I was backing up and it didn't engage until I was past half way, the check engine light came on. Things I've done
Brand new Accelerator pedal (nothing)
Checked all fuses (nothing)
Showed it to someone and they're telling me I need a new ecm
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post #2 of 23 (permalink) Old 06-16-2019, 05:49 PM
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did you damage any part of the harness when you drilled?
try unhooking battery for a few mn.
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post #3 of 23 (permalink) Old 06-16-2019, 10:28 PM
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I would guess you damaged the harness. I have seen it many times with people trying to drill through boots.

The damaged harness can also lead to a fried ecm/ecu.


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post #4 of 23 (permalink) Old 06-16-2019, 11:14 PM Thread Starter
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Originally Posted by restosud View Post
did you damage any part of the harness when you drilled?
try unhooking battery for a few mn.
Tried that already did nothing
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post #5 of 23 (permalink) Old 06-16-2019, 11:15 PM Thread Starter
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I would guess you damaged the harness. I have seen it many times with people trying to drill through boots.

The damaged harness can also lead to a fried ecm/ecu.
besides the throttle issue everything else works A1
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post #6 of 23 (permalink) Old 06-16-2019, 11:28 PM
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besides the throttle issue everything else works A1
how about the harness??
recheck everything you did.

Last edited by restosud; 06-17-2019 at 12:35 AM.
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post #7 of 23 (permalink) Old 06-17-2019, 02:52 AM Thread Starter
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besides the throttle issue everything else works A1
how about the harness??
recheck everything you did.
How can I get the gramet out? I've tried pushing it from the cabin out to the engine and it just won't budge
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post #8 of 23 (permalink) Old 06-17-2019, 01:50 PM
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When you unplugged the harness to the peddle the 1st time did a pin break off in one side or the other?

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post #9 of 23 (permalink) Old 06-17-2019, 07:10 PM Thread Starter
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Nope, all the pins are still intact
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post #10 of 23 (permalink) Old 06-17-2019, 07:29 PM
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What wire did you tap into to power the camera?

Try disconnecting it, then the battery and let it sit for a few minutes. Reconnect the battery (but not the camera) and see if that helps.

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post #11 of 23 (permalink) Old 06-17-2019, 07:57 PM Thread Starter
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I have the Phoenix radio and that has it's own power cable for the camera.
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post #12 of 23 (permalink) Old 06-17-2019, 09:04 PM
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The grommet is a pita, you have to unwrap all the tape around the outer lips of the grommet, I believe on both sides.

There is a nipple on the bottom of the grommet that you can cut the tip off and fit at least a 4ga wire through without issues or worries of damaging the harness.

And it only takes two wires to be bare touching, or one wire to be cut to cause an issue.


It's that, or you undo the head unit you installed and see if that's the cause...


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post #13 of 23 (permalink) Old 06-17-2019, 09:59 PM Thread Starter
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I do remember a bunch of clicking noise happening as soon as I turned the drill on and the sound continued, but I think the drill was stuck at that point
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post #14 of 23 (permalink) Old 06-19-2019, 06:58 PM
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You may have created a communications problem between the ECM and the pedal. The pedal wire is probably carrying a digital communications and I am guessing that the wire(s) you wrapped around it are interfering with the communications. It may also be interfering with the communications in the wire harness where it goes through the dash as well. Try removing all that wiring, resent the computer by disconnecting the battery, and see if the pedal starts working again.

Also, you should really should pull your power supply right off of the battery because if you tapped into a one of the wires under the hood, you could screw up the digital communications as well.

If it works, use temporary wiring to relocate the wire(s) away from all those harnesses and see if your camera AND the rest of the truck works. If so, run the permanent wiring for your camera so it is away from your truck harness. If it stops working again, you should be able to figure out hot it is interfering.

This stuff can be difficult to figure out. You might also go see one of your local Truck and Stuff type places that install cameras like this. They may be able to point you in the right direction.
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post #15 of 23 (permalink) Old 06-19-2019, 09:03 PM Thread Starter
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You may have created a communications problem between the ECM and the pedal. The pedal wire is probably carrying a digital communications and I am guessing that the wire(s) you wrapped around it are interfering with the communications. It may also be interfering with the communications in the wire harness where it goes through the dash as well. Try removing all that wiring, resent the computer by disconnecting the battery, and see if the pedal starts working again.

Also, you should really should pull your power supply right off of the battery because if you tapped into a one of the wires under the hood, you could screw up the digital communications as well.

If it works, use temporary wiring to relocate the wire(s) away from all those harnesses and see if your camera AND the rest of the truck works. If so, run the permanent wiring for your camera so it is away from your truck harness. If it stops working again, you should be able to figure out hot it is interfering.

This stuff can be difficult to figure out. You might also go see one of your local Truck and Stuff type places that install cameras like this. They may be able to point you in the right direction.


Great tips, I'll try to do that. I grounded the camera wire on the crossmember (I think that's what its called) its near the battery. I was thinking about dropping it off to the dealership for a diagnostics only
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