With winter right around the corner, you can count on seeing some concerned customers with wiper issues. But what do you do when you can’t figure out how to repair non-working wipers once you’ve already tried the recommended repair? This is what one SureTrack community member experienced when his customer brought in a 2012 Jeep Liberty Sport 3.7L with non-functioning wipers.
Diagnosis
First, the technician observed there was no movement in any direction when turning on the wipers. He connected the scanner and found code B2304 (Park switch stuck high). With the provided repair, he checked the fuses and replaced the wiper motor as suggested; it still did not run!
Now, code B2305 (Park circuit low) was being displayed. It too said replace the wiper motor. The technician did know the TIPM (totally integrated power module) runs the relays in the power module in order to put power to the motor, but he didn’t know if the TIPM tries to turn them on if these codes are present. Frustrated and confused, the technician turned to a fellow SureTrack community member.
The member suggested the code calls for a short to ground in the Park circuit between the wiper motor and the TIPM. If the technician is sure the wire is not shorted to ground, he would suspect the TIPM itself, which is a common failure on Chrysler products. With this advice and after testing the amp draw on the motor and finding it was 4 amps higher than the new one, he found his solution.
Fix
The technician replaced both the TIPM and the wiper motor. After thorough testing and with the help of fellow community member, the issue was completely resolved. The technician is putting yet another safe driver on the road this winter.
Real Fixes from Mitchell 1’s SureTrack® expert information resource are documented issues from actual shop repair orders and community discussions. Read the Real Fix in the Mitchell 1 ShopConnection Blog.
