ecm problem
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Junior Member
Joined: Jul 2004
Posts: 57
Likes: 0
From: Pa
Car: 84 z28
Engine: 305
Transmission: 700r4
ecm problem
ok i have an 84 z28 with a 305. everything is basicly stock. i can't find where it is. i know its under the dash somewhere but what all do i have to take off? also what all has to be connected to pull the codes. i tried to pull them but the check engine light didn't even come on my brother disconnected alot of things so i don't know what is connected but with there help of my haynes manaul and the help of u guys i can find where everything is. thanks for all the help in advance
TGO Supporter
Joined: Sep 2003
Posts: 6,127
Likes: 11
From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
If it is installed, you will have to remove the knee bolster panel under the dash on the passenger side. under the dash by the passengers right knee is where you will find the ECM if it hasn't been previously removed.
Joined: Apr 2004
Posts: 3,180
Likes: 3
From: Browns Town
Car: 86 Monte SS (730,$8D,G3,AP,4K,S_V4)
Engine: 406 Hyd Roller 236/242
Transmission: 700R4 HomeBrew, 2.4K stall
Axle/Gears: 3:73 Posi, 7.5 Soon to break
light driver
There is a light driver module used to turn on the "Check engine" light. The ECM triggers it negative to ground and it turns the light on with its power. (small box with a slide out board in it).
It will be behind the glovebox, look above the inside top for it.
Or the bulb may just be burned out.
It will be behind the glovebox, look above the inside top for it.
Or the bulb may just be burned out.
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