I have a 1986 jaguar xj6. Can anyone direct me how to determine, where the issue lies. I have replaced the wiper relay, and trying to check voltage output at wiper motor to see if I have voltage....Can someone walk me thru the steps?
Thanks

 

can anyone help me troubleshoot my wiper motor for 1986 jaguar xj6... What is easiest methos to check for electrical issue

 

could be the wiper stalk switch itself, so don't start replacing components unless you know they're bad. The first place to troubleshoot is the switch itself in these cars.

Remove the vinyl panel under the dash, and then remove the lower plastic half of the steering column cover, also known as "Nacelle", so you can have visual and hand access to the wires entering the rear of the wipers switch case.

With engine running, turn the switch to Low Speed and wiggle each wire behind the switch until you get a response. Chances are the ground switch (black wire) will be the culprit.

 

Jose
Was able to get to harness per your instruction. Wiggled the wires in slow speed mode, no result. Will I be able to do a voltage or resistance test in this signal stalk or what is best way to proceed. Thanks JimJam

 

Thanks Jose. Was able to get to the harness per your instructions. Wiggled the wires, with engine running and in slow speed, no success. Is there a votage check I can do, if so across which wires. Thanks JimJam

 

Jose
Later this afternoon, I found a blown 35 amp fuse on #6 (Wiper Motor). I replace the blown fuse turned on the wiper switch, and immediately blew another fuse. Replaced the fuse, disconnected the wire harness to the wiper motor and found voltage at the #1 pin. Tomorrow, I plan to disconnect the cable arm from the wiper motor, to see if I get the motor to turn or blow another fuse. I believe the wiper motor may have failed. Is there a rebuilt kit out their for my 86 jag. Thanks JimJam

 

I'm the last one to conclude the motor is blowing the fuse, maybe the Brushes have perished at the motor. There is a business that rebuilds these motors, the business is called East Coast Jaguar, his name is John, call him at 302-475-7200.

or send e-mail to: John Digiacoma

 

Thanks Jose
Appreciate the information JimJam

 

Another couple of ideas:


1. Remove the motor. Take it apart. As in most DC motors, t is the brushes that wear out. Search the archives here, a member posted a detailed install that restored his wiper motor to duty.


2. Get a good used one from David Boger at everydayxj. Posts here, and is a good guy. Reasonable pricing as well. The motor from a car that lived in the SW has had little use!!!


Carl

 

Before doing *anything else*, replace the fuse and thighten the fuse cradle. Now, your first tendency is to reject this suggestion but I can tell you from experience with many Series III cars that electrical issues are almost never with the principal components - in this case the wiper motor - but with the fuse, the fuse connection or another connector.
Now a case in point: a 1992 Series III v12 VDP, pristine, never driven in the wet. But every year I did a full check of every system. One year, while checking the wipers (arms pulled away from the glass, of course), the wipers went 1/4 of the way and then stopped dead - no sound, nothing.
Well, following my own advice I replaced the fuse. Still nothing. So I went to the column switch - no problem there (and remember - the wipers had essentially never been used in anger)...so, I went to the wiper motor, checked the park mechanism, all connections...nothing. I was about to tear the motor apart when common sense intervened...not being able to source the problem I took this beautiful beast to my Jaguar-specialist mechanic who listened to the story and said "it's the fuse". I told him it couldn't be because I had replaced the fuse. He repeated that it was the fuse, took his tester probe to the fuse box under the steering wheel and in exactly 3 seconds the wipers were running perfectly.
Now, this is the case also with most issues involving headlamps on the cars, and the climate control fans and....
The fuses can look good, even test as good, but still have a broken filament that makes only intermittent contact with the cap. The fuse cradles can be distorted, thus not making proper contact, or dirty, or they can have a light coating of corrosion.
The mantra for the XJ cars of the 70 to 92 period is "fuses, fuses, fuses" with an alternate mantra: "connectors, fuses, connectors, fuses...."

 

Carl
Really appreciate the information. As I continued to dig into this issue, the last thing I did was disconnect the pivot arm from the wiper motor, and tried it with the wiper arms disconnected. When I turned on my wiper switch I observed my motor pivot arm operating in all 3 modes...Slow fast and intermediate. I than moved my wiper arms back and forth to ensure the cable and connecting arm moved freely. My next step will be to hook my connecting arm back up and hopefully not blow any fuses. Appreciate your previous feedback and help JimJam.

 

Greg.
I was blowing a 35 amp fuse (#6). After disconnecting the pivot arm, i reconnected the harness, and all 3 modes were operational. I rechecked my pivot arm and cable to make sure nothing was binding. I am about to reconnect and hopefully run w/o blowing any fuses. Thanks so much for your input JimJam

 

Good work.


A mechanical JAM ! Sorry, I could not resist....


Off to make brunch.


Carl

 

Appreciate the Humor. Good one.
JimJam