Left turn signals

[Darryl]

I’m trying to trace down a problem with my left turn signal. The left rears work fine but the front light, the dash indicator and the side lights do not work. The connection under the drivers seat in the battery compartment is good. Tested with an additional ground on each light but didn’t help. Any suggestions on where to go from here?

Darryl

[Chap]

The front and side lights are on the same relay inside the PMMI turn signal box.
https://www.wanderlodgeownersgroup.c...5&d=1466614533

[Darryl]

Hi Chap, looks like you’ve done this before! Thanks for the schematics. Just to make sure, this is the existing PMMI board and it should be jumperred per the instructions on right lower corner of drawing? Is the PMMI board over the driver connected to the really dim digital clock? Thanks for the help Chap. And 5hanks for yours Kiki.

Darryl

[kunzelj]

These are the relays if you choose to only replace the bad relay. They are not easy to de-solder - I recommend someone who is experienced with soldering sensitive electronics do the work. I replaced one bad relay in my box and it's been good.

https://www.alliedelec.com/product/n...0-12/70726726/

[Chap]

This thread has lots of good info Darryl. In the third post Bill says where it's located in his '88 FC. The thread is mainly about a PT, but there's much in common. https://www.wanderlodgeownersgroup.c...ad.php?t=25717

[Darryl]

Looks like on an FC the PMMI box is in the left hand access. I will look tomorrow. Am I correct. That the left hand access is the access below the driver that has the 4 house batteries? Are any of our WOG group up for soldering in a new relay?

Darryl

[kunzelj]

You will need to remove the grille. Then remove the panel cover on the driver's side. There are two silver boxes. One is for the ZF and the other for turn signals.

[Bill Pape]

Originally Posted by Darryl

Looks like on an FC the PMMI box is in the left hand access. I will look tomorrow. Am I correct. That the left hand access is the access below the driver that has the 4 house batteries? Are any of our WOG group up for soldering in a new relay?

Darryl

behind the grill, behind the access panel, driver side above the headlights.
square aluminum box, one for the ZF other for the turn signals

[Darryl]

Ok thanks guys. I will pull the grill in the morning. I am amazed that my serious problem is solved that easy by simply reaching out. Thanks again.

So when would I jumper per the drawing?

Darryl

[kunzelj]

Right hand side box on mine. Left hand was the ZF interface.

Jumper - personal choice if you are fond of the wire cutters. I had mine soldered and am happy to keep it original. Bosch relays are nice for their durability and ease to change. I have converted to LED on all bulbs so I have reduced the load on these relays.