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'96 Chevy S10 Brake Lights fuse trbl
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43car
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Jan 6, 2006, 8:32 PM
Post #1 of 11
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'96 Chevy S10 Brake Lights fuse trbl
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Hey Anybody?
Having a problem with our Chevy S10 brake Lights that keeps blowing it's fuse. I have removed all the signal lamps (including the third brake light) and the hazard warning flasher. No help. I also disconnected the brake pedal switch and its ok. I have tried to disconnect the hazard light switch but can't figure out how to disconnect the wiring. Any suggestions would be appreciated.
Thanks,
Jeff
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 6, 2006, 10:18 PM
Post #2 of 11
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Re: '96 Chevy S10 Brake Lights fuse trbl
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Question: Will the fuse blow before you hit the brakes? If not I would suspect the sockets the light bulbs go in and they should be available locally for cheap bucks. If you think that's it, solder them in and use shrink tubing over the connections. Grease the bulb sockets too. Just an idea and hope it helps. Best to use dialetctic (silicone) grease or at least WD-40. - T
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43car
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Jan 7, 2006, 7:56 AM
Post #3 of 11
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Re: '96 Chevy S10 Brake Lights fuse trbl
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No, it will blow without applying the brake pedal. As soon as I try to install the fuse it will blow. Can you tell the trick to disconnecting the turn signal/hazard lights switch wiring harness so I can prove there isn't a fault in that device?
Thanks,
Jeff
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DanD
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Jan 7, 2006, 8:29 AM
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Re: '96 Chevy S10 Brake Lights fuse trbl
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I believe the 4way switch is part of the turn signal switch, if so you’ll need to pull the steering wheel and split the column to disconnect it.
That will also mean dealing with the air bag, be very careful poking around an air bag system, it doesn’t take a lot to set off the bag if to accidentally touch the wrong thing.
Get a manual and read up on how to properly disarm the air bag.
This won’t help with disconnecting the switch but if you’re tired of blowing fuses while you’re trying to find the short; get yourself a sealed beam headlight and a repair pigtail connecter for the headlight. Now plug the wires of the pigtail into the fuse panel were the fuse would normally go. The headlight will light, now keep unplugging things or wiring harnesses until the headlight either goes out or gets dim. When it does you’ve found the short.
Dan.
Canadian "EH"
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43car
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Jan 7, 2006, 10:00 PM
Post #5 of 11
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Re: '96 Chevy S10 Brake Lights fuse trbl
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Okay I managed to disconnect the 4 way switch and it's okay. I have removed the negative lead to the battery and I am troubleshooting with a volt/ohm meter so the airbag shouldn't be a factor. I have unhooked the tail lights at the disconnect and they are good. I also unhooked the third brake light and it is good. I would like to know if anyone has a wiring diagram for this truck as I can't seem to figure out the path for the turn signal/hazard lights in the front which are on the brake light circuit.
Thanks,
Jeff
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DanD
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Jan 8, 2006, 1:32 AM
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Re: '96 Chevy S10 Brake Lights fuse trbl
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I’m not at the shop so I don’t have access to my diagrams, if you can wait I’ll have a look at what I have and post if I think it’ll help. Rereading the other posts and with you saying that the fuse blows with out activating the brake light switch; it may not be a lighting issue that’s causing this.
Most times they will pair up the exterior lighting with another device such as an accessory power outlet, cigarette lighter or the radios memory. Their theory behind this is if a convenience item isn’t working we’ll likely investigate; where as if the brake lights were on their own we wouldn’t know, until we are told. Just thinking out loud; but its maybe worth having a look around.
Dan.
Canadian "EH"
(This post was edited by DanD on Jan 8, 2006, 6:16 AM)
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Tom Greenleaf
Ultimate Carjunky
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Jan 8, 2006, 10:01 AM
Post #7 of 11
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Re: '96 Chevy S10 Brake Lights fuse trbl
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I like that idea. Check owner's manual and see what else might be on the same fuse. Years ago many cars linked the dash lights to brake lights so you would investigate and know they didn't work. It's hard to tell if your brake lights are working if you are alone. I followed my own car once and they didn't work!! I freaked and fixed that right away but was unaware of it till then. Good luck, keep at it, - T
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DanD
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Jan 9, 2006, 5:19 AM
Post #8 of 11
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Re: '96 Chevy S10 Brake Lights fuse trbl
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Here are a couple of diagrams; the first one shows the brake/hazard fuse, only showing the hazard flasher and the stop light/torque converter clutch switch. Which are only energized with the brake pedal applied (see how the switch is open). Again with you saying that the fuse blows without activating the switch and you’ve disconnected the 4-way flasher the problem has to be before these switches.
Also notice that the orange wire is dotted as it leaves the fuse box that tells us there is something else on that circuit.
In the second diagram; which is a power distribution diagram, we see that this orange wire also feeds the “Audio Alarm Module” in other words the key in the ignition chime. You’ll find this module in the power distribution box below the left side of the dash.
Hope this helps.
Dan.
Sorry for the size of the diagrams anything smaller would make it to difficult to read; for me anyway. LOL
Canadian "EH"
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43car
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Jan 9, 2006, 6:29 PM
Post #9 of 11
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Re: '96 Chevy S10 Brake Lights fuse trbl
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Thanks for the diagrams you posted they are a huge help. There are a few things that stick out. The first one you point out and also the optional trailor wiring. Is it possible that this is where the trouble is? I found these wires stuffed up in the frame with some obviuous broken down insulation and black marks on the yellow and heavier gauge white wire.. Like it has been shorting and grounding out. Also because this fuse is hot at all times. What should on see on my ohm meter at the fuse box with the battery disconnected? I've been fooling with this so long I'm startin' to get cornfused.
Thanks again for the help,you guys are great!
Jeff
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DanD
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Jan 9, 2006, 7:25 PM
Post #10 of 11
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Re: '96 Chevy S10 Brake Lights fuse trbl
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Sorry but throw your ohmmeter away for this kind of problem, it will just confuse the situation. Again, and without being there first hand I wouldn’t worry about things after the brake light switch. The fuse is blowing with out activating the switch.
Dan.
Canadian "EH"
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43car
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Jan 11, 2006, 4:48 PM
Post #11 of 11
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Re: '96 Chevy S10 Brake Lights fuse trbl
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Okay your were right that meter was throwing me off, but I am happy to report that I found the trouble. Turns out it was the brake pedal switch. At first look, it seemed okay, but actually it was bad. My son told me the lights came on while he was outside the truck once before the fuse started to blow later.
Thanks for all the help, once again you guys are a great help.
Jeff
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