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My general warning light stays on which I belive means : Gen ON, ABS off = Tail light/brake light defective BUT the tail light / brake light works! Is there a trouble shooting tree on what to look for in what order?![]()
"Could it also be an intermittent problem with the rear ABS sensor?"
I believe a faulty sensor should give a different warning. Gen OFF, ABS flashes at 1Hz = ABS not available. Pull-away test not completed.
Unfortunately, just because a switch goes, click, click, doesn't mean it works. Its probably rare, but its still possible for the contacts in the switch to be defective. If you have an VOM meter, you can pull apart the rear brake light connector and check it for resistance. The connector is tie wrapped to the frame on the RH side near the clutch bleed pipe. Set the VOM to lowest setting for ohms and connect the test leads to connector and operate the switch. You should see very little resistance with the switch closed. It's backwards, so when you apply the brake, the switch opens, and resistance should be infinite.
Ok, I'm going to be the guy who overthinks this problem.
Check for play in your final drive. Just had a friend who experienced a similar issue, left it alone because they were going on a trip...and had the FD bearings self-destruct halfway into the trip.
Turns out the initial play in the FD caused the ABS sensor to rub up against the exciter disc resulting in the ABS fault. Not saying that this is your issue, just that it could be.