Brake pcm problem?
05-13-2013, 02:39 PM
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Car: 1991 camaro rs
Engine: 3.1 - looking to upgrade to 3400 hy
Transmission: 700r4
Axle/Gears: Stock? Lol
Brake pcm problem?
So 1991 camaro rs 3.1 today me and my teacher were checking the real times on my car with an aldl connector and computer. Something pretty odd happened when I said lets check the brake booster for vacuum leaks. (hit brake while running) the aldl cut out said no connection. We retested 5 times. I hit the brakes and my pcm (?) Cuts out. Top of that my brake lights only work when the nighttime lights are off. (head lights and such) so idk where to even start on this one ><
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05-13-2013, 03:16 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: Brake pcm problem?
get under the dash and look to se if the pedals are rubbbing on any wires
second thing to do would be to disconect the brake light switch on the pedal and see if that makes a difference
second thing to do would be to disconect the brake light switch on the pedal and see if that makes a difference
Last edited by project89; 05-13-2013 at 03:20 PM.
05-13-2013, 08:34 PM
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Car: 1991 camaro rs
Engine: 3.1 - looking to upgrade to 3400 hy
Transmission: 700r4
Axle/Gears: Stock? Lol
The pedals are not touching anything. Tomorrow ill try pulling it.
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05-13-2013, 10:42 PM
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Car: 1985 IROC-Z28
Engine: LB9
Transmission: 700R4
Axle/Gears: 3.73
Re: Brake pcm problem?
i've seen something odd like this before... ALDL communications would quit from shifting out of park.
take a good look at grounds.
take a good look at grounds.
05-15-2013, 10:09 PM
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Car: 1991 camaro rs
Engine: 3.1 - looking to upgrade to 3400 hy
Transmission: 700r4
Axle/Gears: Stock? Lol
So I tested a little bit. Ground for the lights / brake switch are fine. Odd though I have 12.7 volts going into the switch and 11.5 coming out.
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05-15-2013, 11:01 PM
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Car: 1991 camaro rs
Engine: 3.1 - looking to upgrade to 3400 hy
Transmission: 700r4
Axle/Gears: Stock? Lol
Volts stayed at 12.7 but a high resistance switch won't cause my pcm to mess up would it?
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