Did you figure out why the headlight switch had burned up?So I recently bought this truck and while running through it and checking for any problems it may have the headlight switch burnt up and since I had the bezel out I took the instrument cluster out to check all of the bulbs. I realized that someone at some point had removed the service engine soon light and replaced it. I have codes 37 and 43. 43 is easy enough I will go get a knock sensor and replace it but what do I need to do to fix code 37? It says that 37 is Torque Converter Clutch Brake Switch Circuit Error. That is fine and I know what it is but how do it go about fixing it. I cant seem to find any info on this code.
1993 Sierra C1500
43 is knock sensor and its wiring but I see youve already done that.
37 is almost certainly the brake light switch.
It is such a commen failure that It is not worth the time to diagnose it.
Get a new switch. They are a real pain to replace.
The clip that holds the switch onto the brake rod tends to either fly away or go into your eyeball.
You can get a spare clip from Dorman.
I recomend that you spend the three bucks so you dont have to chase that thing.
And wear safety glasses.
This might not solve all of your problems.
But I can gaurantee you that those parts are bad or intermittantly failing.
You can chase your tail forever if you get screwy results depending on if the engine is hot or cold or if you hit a pothole or whatever variable.
Everybody calls it the "Parts Cannon"
Replaceing all of the sensors and rebuilding the TBI and repairing all of the grounds is not firing the parts cannon.
Replacing random parts expecting that it will solve a problem is firing the parts cannon.
They are one of the most reliable platforms ever built.
But they are old.
Pop the hood, take the TBI off and rebuild it, Peel all the wiring all the way back to the firewall and fix it.
Repair all of the grounds.
Chase the wiring all the way back to the bed and fix it.
Set aside one weekend a month that is nothing but truck work.
Do that every month and within a year you will have all of those systems repaired.
You can essentially build yourself a new truck if you dont get discouraged and loose your marbles.
I have about 280k on mine.
factory engine and factory trans.
I gas it up and hual ass from Seattle to Detroit and the only downside is it doesnt have heated mirrors.
I bought this truck something like 12 or 13 years ago for 2 thousand bucks
Im probably into it for about 4 grand in parts over 12 years including brakes and plugs and a radiator etc..
Many, many hours of reparing and upgrading every part of the wiring.
The old saying.
How do eat an elephant?
One bite at a time.
Now I have a truck that I wouldnt hesitate for a second to drive deep into Mexico.
And it is about 60 thousand dollars cheaper than a new truck.
That spare 60 spread across about 40 years of fixing my own crap and not having a car payment is why I own my house free and clear and thats how the kids went to college.
It us really easy to get discouraged and frustrated and think that it is all beyond you.
Especially when gatekeepers decide that you havent met whatever absurd thresehold.
That is just not true.
Everybody started out not knowing **** all about anything.
Car culture can be great. You can meet some amazing people who become life long freinds.
Same with racing. You can meet incredible fine people.
But some of those people can be the worst gatekeeping little princess tiarra crown wearing butt hurt posers.
Car show vultures.
The ******* guy who has a a couple of standboards with all of the pictures of the stupid amount of money he spent on yet another 1st gen Camaro and his wife has a box of piss warm ham sandwiches but that **** aint gonna eat becuase he just caught you out for having aftermarket door lock knobs.
He doesnt give a **** that his kids moved the **** out when they were 15.
He doesnt give a **** that his wife is gonna cut off his IV when nobody is watching.
He has OEM parts and your window crank isnt up to *****.
We call them "Car Queens"
The bondo brigade.
They paid somebody to build the car.
They trailered it to the show.
It is an undriveable plastic **** wagon.
This guy has spent more time and more effort on accumilating his tee shirt collection from various car companies that have nothing to do with his car.
Hes about 5 foot 9 and shaves his head and has some 1990s tribal tatoos and a barbed wire tat but he doesnt know what it means.
At least twice divorced and hangs out at strip clubs cuz he is sure that Candy really digs him and he can save her.
True love.
It is hard to sort those with good intentions from those who enjoy tearing you down.
You can do this. You can figure it out.
You just have to keep at it.
Dont give up.
I am the company clown on this forum.
If I can make this old **** run you sure as hell can do it too.