Quote:
Originally Posted by Gibby
1990 ZR1 - reading about many possibilities. Where should I start ? Waiting on my factory service manual CD to deliver.
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Happen to be troubleshooting my ABS as well as it is currently non-functional.
My initial steps (low hanging fruit) will be as follows:
1. Pull codes (jumper A-H pins in ALDL connector),
2. Inspect ABS unit and wiring in the well behind the driver's seat,
3. Check ABS associated fuses (none blown, correct size, seat tightly),
4. Check grounding wire (loose, corroded?),
5. Attempt to reseat relays/connectors by removing/disconnecting then re-installing/reconnecting,
6. Inspect ABS sensors/wiring for damage.
If the above do not fix, I'll need a new TS plan. I managed to find the Bosch ABS training manual on eBay so will be reading through the Service Manual supplement and the trng man to get more familiar with the system and devise a step-by-step plan. If I had a set of relays I'd probably just try those right off the bat (more low hanging fruit), but I don't at the moment.