C4 abs
02-08-2012, 08:44 AM
#1
Suckin' gas, haulin' ass.
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Member Since: Apr 2010
Location: Newport News Virginia
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C4 abs
I'm not getting any replies over in C4, so I figure you guys might be able to help:
So my 89 track car is nearing completion. All that's left (yea right, lol) is wiring, corner weighting, alignment, and tuning.
I'm running a carb setup, and rewiring the whole car since the PO decided to play cut and splice. Basically I'm removing every wire that won't be used. I just want a little info on the ABS, since I'd like to keep it.
If I'm reading the FSM correctly, it looks like I need to keep the Lateral Acceleration Switch, an Ignition On input, a brake applied input, and power on the wire from the fusible link. Does that about cover it? I don't really see the need for lights, but if they are required, I can put some in.
What do you guys think?
So my 89 track car is nearing completion. All that's left (yea right, lol) is wiring, corner weighting, alignment, and tuning.
I'm running a carb setup, and rewiring the whole car since the PO decided to play cut and splice. Basically I'm removing every wire that won't be used. I just want a little info on the ABS, since I'd like to keep it.
If I'm reading the FSM correctly, it looks like I need to keep the Lateral Acceleration Switch, an Ignition On input, a brake applied input, and power on the wire from the fusible link. Does that about cover it? I don't really see the need for lights, but if they are required, I can put some in.
What do you guys think?
02-08-2012, 10:23 AM
#2
Le Mans Master
It sounds reasonable.
I didn't see your post over in c4
Good Luck!
I didn't see your post over in c4
Good Luck!
02-08-2012, 05:33 PM
#3
Safety Car
If I'm reading the FSM correctly, it looks like I need to keep the Lateral Acceleration Switch, an Ignition On input, a brake applied input, and power on the wire from the fusible link. Does that about cover it? I don't really see the need for lights, but if they are required, I can put some in.
You sure you want to keep it? James, do you still have ABS?
02-08-2012, 07:09 PM
#4
Le Mans Master
The accel should be a sensor, not a switch, I assume that's what you meant. Lights should not matter for operation, but you never know with some of the old systems. I think I have an '89 FSM, I'll take a look at the wiring diagram.
You sure you want to keep it? James, do you still have ABS?
You sure you want to keep it? James, do you still have ABS?
02-08-2012, 09:24 PM
#5
Suckin' gas, haulin' ass.
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Member Since: Apr 2010
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I ended up figuring it all out. Here is what is posted in my C4 Tech post:
Originally Posted by Black89Z51
Thanks for the reply. I spent most of the day hacking about 50 lbs. (literally) of wire out of the car. I had a friend who is more literate with wiring diagrams than me. What it came down to was it needed a power input, via the "J" fusible link, it needs the lateral accelerometer, a brake input via the brake switch to the 3rd brake light, wheel speed sensors (obviously), and an ignition on input.
It was pretty easy once I got to looking at it. Basically all that was needed was about 5 wires out of the entire body harness. I kept aft end of the car harness. (Lights, fuel pump, fuel sending unit, ABS, brake lights, defroster, hatch release, etc.).
And yes, you are correct that the unit is stand-alone. The diagnostic for the early ABS plug in-line with the module harness and the module. Now I just hope the ABS actually functions.
It was pretty easy once I got to looking at it. Basically all that was needed was about 5 wires out of the entire body harness. I kept aft end of the car harness. (Lights, fuel pump, fuel sending unit, ABS, brake lights, defroster, hatch release, etc.).
And yes, you are correct that the unit is stand-alone. The diagnostic for the early ABS plug in-line with the module harness and the module. Now I just hope the ABS actually functions.