View Full Version : wipers randomly deceased :l

April 9th, 2008, 10:16
so my wipers worked great till i disconnected battery & replaced my tcu. now i turn em on and i here a click and nothing works with em. i tested for continuity through the terminals on the box that unplugs under dash (90 xj) and got nothin throught the ground terminal.. went to u pull it and tested 4 different ones and none had continuity through ground so i thought maybe its supposed to be like that? anyone go through this before? seems like the circuit all that stuff runs off is haywire on my jeep. no bueno

April 9th, 2008, 10:32
okay this seems too simple but.... fuse?

April 9th, 2008, 12:33
nope. it was good. unless theres a secret one not on the fuse block?

April 9th, 2008, 12:36
remove the "box" under the dash and plug the two plugs directly together and see if anything works that way-- if so, prolly bad box. If not, bad switch or bad wiper motor. Don't expect the delay function to work without the box, but the wipers should work on slow speed without the box connected.

April 9th, 2008, 13:58
ill try that thanks

April 10th, 2008, 15:42
:doh: didnt work...

April 10th, 2008, 18:18
The click noise is coming from a relay. I had the same problem on my 1988 last month, wipers didn't work but there was a click when I turned them on. It turned out to be the motor itself. I didn't investigate what was wrong, I connected another wiper motor I had and it worked...
I replaced it and I got plastic bushings from "Help!" products to fix the the loose transmission at the same time. Now they work flawlessly and they don't stop in the middle of the windshield!

The day before the front wipers went bad, I just had fixed a problem with the rear wiper motor on my 1988. It was a 50 cents diode that needed to be replaced on the motor.