Toyota Tacoma Forum banner
Cancel

04' Taco 2wd. Fuses issue ( cig lighter, other aux and door sensor )

826 Views 6 Replies 2 Participants Last post by  Enola Gaia, 
T
Hey guys,

I went all over google, my owner's manual, and this forum looking for the answer.

Usually if I open my door my headlights will turn off, if there were on prior to exiting the vehicle. I also noticed that none of my cigerette 12v adapters work in the truck either.

I have all manual locks, and windows.

Does anyone know where this fuse is at? I'd like to replace it soon as my truck doesnt know when the door is open, so my alarm doesnt know it is open either :(.

Please let me know! Thanks guys!
Reply
Save
Like
1 - 7 of 7 Posts
Enola Gaia
(1) There's no single fuse common to all the things you list.

(2) Are you saying that *both* the cigarette lighter *and* the 12V power outlet(s) are dead?

(3) Set your dome light to the 'Door' position and see if it comes on when you open the doors. If it fails to open with either door, report back on which one(s) fail to trigger the light.
Reply
Save
Like
Enola Gaia
One more thing - Is your clock working?
Reply
Save
Like
T
Enola Gaia said:
One more thing - Is your clock working?
Click to expand...
Clock is working.

I set my dome to door, dome light works in any other fashion besides the door.

Im actually not 100% positive on the AUX's, I know for a fact the cigerette lighter stopped working. It was took dark for me to get one of my old working AUX adapters to really test those out.
Reply
Save
Like
Enola Gaia
The dome light not working in the 'Door' position and the lights failing to turn off could be explained by a bad driver-side courtesy switch (or a fault in its wiring).
Reply
Save
Like
Enola Gaia
The 15A Dome fuse is involved in powering the Body ECU - which is the controller for the light auto off function. However, if this fuse were bad you wouldn't have any dome light at all, and the clock wouldn't be lit up. So it's not this fuse ...
Reply
Save
Like
Enola Gaia
3
OK ... The only 2 problems that have been confirmed are a dead cigarette lighter and a dead light auto-turnoff function. Let's proceed as if those are the only 2 issues, and as if the dual failure has a common cause ...

These 2 circuits do not share a power source or a controller / switch. They do, however, share the same grounding points. Both circuits ground to 2 ground points - IE and IG, located at or near the left and right ends of the reinforcement (structural thingie up under the dash). Both circuits connect to these ground points via single connections through Junction Block No. 3 (of which there are two - no, I have no idea why two things have the same name). The J/B 3 involved here is the one located somewhere behind the dash in the vicinity of the steering column and the cluster.

If either (a) the J/B 3 connections for these two circuits to ground are faulty or (b) the wiring leading from J/B 3 onward to the ground points is faulty, this would explain why these two particular circuits are dead.

Here (attached) are the 2004 wiring diagrams for the two circuits, plus an illustration of the J/B 3 location.

Attachments

See less See more
Reply
Save
Like
1 - 7 of 7 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Toyota Tacoma Forum
A forum community dedicated to Toyota Tacoma owners and enthusiasts. Come join the discussion about performance, modifications, overlanding, lift kits, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
Performance 1995.5-2004 Parts and Accessories Introduce Yourself Lights / Exterior Electricals
Top