Harney Riata wiring diagram?

[Bassman50]

Does anybody have a wiring diagram for a 2001 Harney Coachworks Riata?
Trying to figure out a brake light issue.

[sfi4]

I wish I had wiring diagrams also -- Have spent many hours tracing wires trying to recreate them

I haven't yet found any wires for the brake lights -- All of the wiring harness connectors I've mapped out don't include the brake lights

There should be a switch underneath the driver where the brake pedal linkage enters the main hydraulic braking cylinder (If your chassis has hydraulic brakes) -- Should be a contact type plunger switch with only 2 wires connected to it -- 1 Wire has 12vdc from the circuit breaker, the other goes directly to the brake lights -- Check there for proper voltages passing through the switch -- Possible bad switch

If there is no 12vdc on either wire, then the circuit breaker that powers the switch might be bad

Also, check to see if there is a bad ground at the brake lights -- Test for 12vdc to a good chassis ground - not the ground wire leading from the brake light -- If 12vdc is present, then the ground from the brake lights to the chassis has a bad connection

Hope this helps -- If I get a chance tomorrow, I will crawl under my chassis to verify the setup of the actuating switch for the brake lights -- If I find something of interest, I will post another response

Good Luck

[Bassman50]

Yeah, I looked under the floor board and there is a two wire plunger type switch, but it operates the secondary hydraulic brake system and doesn't appear to do the brake lights. I found a relay in the fuse box that is for brake lights, but it doesn't seem to have a power wire going to the solenoid circuit or a switch to trigger it. If I jumper power to the solenoid, it will light the brake lights, but in order for it to work properly, it has to have a switch that operates when you depress the brake pedal and then energizes the solenoid on the relay. I'm afraid to put power through the existing switch as it already has a purpose.