My M915

[Joshua3330]

Hello there, new to this group hoping I could get some help, got a 1984 915A1 that’s got a headlight issue. Changed the switch out and I can get the passenger side tow work sometimes and the drivers side is very very dim, put a meter to it and it’s only getting about 5v. Put a new breaker on, new relay, new bus bar under the light itself, and put new lights on. My last guess is there is something wrong with the wiring harness itself. Has anyone dealt with something like this before?

 

[NDT]

Hello there, new to this group hoping I could get some help, got a 1984 915A1 that’s got a headlight issue. Changed the switch out and I can get the passenger side tow work sometimes and the drivers side is very very dim, put a meter to it and it’s only getting about 5v. Put a new breaker on, new relay, new bus bar under the light itself, and put new lights on. My last guess is there is something wrong with the wiring harness itself. Has anyone dealt with something like this before?

Problem is likely in the bulkhead connector located at the fender.

 

[Joshua3330]

Problem is likely in the bulkhead connector located at the fender.

are you talking about the connector right below the steering column?

 

[NDT]

are you talking about the connector right below the steering column?

yes

 

[simp5782]

are you talking about the connector right below the steering column?

There are 3 connectors for the headlights.

- At the firewall just behind the motor.
- at the rear of the fender right where it meets the cab
- behind the Headlight bucket is a connection bar that separates and distributes power.

 

[swbradley1]

A quick way to check is just run the hot lead from the switch directly to the light and bypass all the connectors. Be careful about swinging a hot lead around though.

 

[Jbulach]

And don’t forget your grounds! Make sure your multimeter is connected to a known good ground when checking your voltage.