Just won an auction - M1088A1

[dwlindsey]

The turn signals and emergency flashers don't work on my M1088.

I just found the flasher unit:


I tested the flasher box. It flashes with 12v DC hooked up and a test light. I'll clean the connector. Is there something else I should check?

 

[dwlindsey]

While under the dash, under the passenger kick plate, I found three cables with connectors that were not connected to anything.

What are they for?

 

[Ronmar]

All the flasher power passes thru the hazard switch(its powered all the time) the flasher output passes thru the turn signal switch. Here is a condensed lighting diagram I drew once upon a time if the hazard sw gets unplugged the TS wont flash…

The cable should have a metal tag with a number on it, P something… on the schematic, on the first page or 2, most all the plugs are listed… Y0u can use the wire numbers on the plug wires to help ID them also…

 

[dwlindsey]

each cable should have a metal tag with a number on it, P something… on the schematic, on the first page or 2, most all the plugs are listed… Y0u can sometimes use the wire numbers on the plug wires to help ID them…

Where is the schematic? I get lost in the TMs. If you could give me a hint, I'd appreciate it

 

[Ronmar]

well the A1 schematics are in the tech manual section here on SS. Forget what year your truck is?

 

[dwlindsey]

well the A1 schematics are in the tech manual section here on SS. Forget what year your truck is?

It's a 2003 M1088 A1. I've downloaded all the TMs for the 1083s would it be in there somewhere? OK, I just found the FMTVA1 schematic.

 

[flyfishtrailer]

Not as familiar with anything beyond an A0, but that could be harness points for a winch control switches. That harness was an option in the A0, but may have been included in A1 and above applications (my attempt at a semi educated guess?)

 

[Ronmar]

there are a couple unused plugs under the pax dash. The trucks use a generic wire harness that supports different options that may or may not be installed in a particular vehicle...

The A1 schematic table is not as complete as the A0(doesn’t show all the Plugs in the list) Message me and I can Email you just the A0 schematic in .PDF form. Between all the versions, the wiring actually stayed very similar with the same breaker plug and relay designations for the most part… Even a lot of the wire numbers remained the same for particular circuits…