Turn signal / wiper arm issue

DonaldDoug

New Member
Joined
Dec 18, 2024
Messages
2
Location
Napa, CA. 94558
I have a 1991 Jeep Wrangler Renegade, the turn signal/wiper arm with the flat lever on top, that pushed forward and backward doesn’t cycle the wiper or mists the window. You can twist the knob on the end of the wiper lever and all wiper functions work. I hot wired the washer motor and it works and squirts water out the nozzels. What causes this??? Thanks. 😭😪
 
I have a similar problem on my ‘95; unfortunately I haven’t figured it out. The washer fluid motor works with external 12v, and the multifunction stalk will make it work if I disconnect the wiper arm motor, but with everything plugged in I can’t get any washer fluid to spray. I don’t know about yours, but mine has a primitive circuit board under the column that I suspect is the issue.
 
I have a similar problem on my ‘95; unfortunately I haven’t figured it out. The washer fluid motor works with external 12v, and the multifunction stalk will make it work if I disconnect the wiper arm motor, but with everything plugged in I can’t get any washer fluid to spray. I don’t know about yours, but mine has a primitive circuit board under the column that I suspect is the issue.

TRevs, thanks for the reply. Please figure it out and let me know. If you have a wiring schematic of that system please give me the URL. There has to be a connection with that flat lever for that one swipe wiper operation and mists for the window. The rear window wiper works but again the squirters don't. And again all the washer hoses and squirters are clear. I only see one washer motor, is that correct? Thanks again. Merry Christmas and a Happy New Year.

 
Wiring diagrams and factory manuals are available Here.

Mine has two fluid motors attached to the single front reservoir, but I don't have a hardtop so I never tried the rear sprayer, even though it’s equipped.
 
I was able to troubleshoot the issue a bit this past weekend. After cleaning some connections I actually got the washer fluid to spray a few times, but it soon stopped again.

I followed the instructions in the FSM which tests the three parts of the circuit separately. I was able to get continuity from the pump motor connector to ground with just ~1 ohm.

Step 2 in the manual is testing voltage on the connector from the switch to ground. For some reason I couldn’t get any voltage on any of the pins, probably because I didn’t have a good ground contact. But I did test for continuity/resistance across the terminals and got 0-1 ohms across the terminals for the wiper Low and High settings, but on the washer pump terminals I did get continuity but it was ~10 ohms.

So now my guess is that the wiper switch is the problem; too much resistance to send adequate voltage to both the wiper motor and the washer pump. I hate to buy a replacement switch because they’re stupid expensive and the reviews are terrible. Maybe I’ll remove the switch and try to clean/rebuild it.
 
My other idea was to use the button and circuit for the rear window washer pump and just connect that hose to the front nozzles, since I don’t have a hardtop. That pump currently is non-functional as well but it might be a lot easier to resurrect.