Safari Simba marker light wiring issue

[FTF]

Hi. I own a 2006 Safari Simba 34' Class A w/ a Workhorse W-22 chassis 8.1 gas engine. Recently my roof marker lights stopped working - all ten, five up front and five in the rear. Sometimes called I.C.C. lights. I checked the fuse, pulled the instrument panel and checked the 6-terminal switch. Here are some questions I have:

What color wire feeds the marker lights?

Does it feed them from the front (up the A-pillar?) or at the rear (nearby to the trailer hitch wiring)?

Besides the fuse block, and the headlight switch is there any other component in the marker light circuit? Like a relay?

Where can I obtain a wiring harness diagram?

Many thanks for your help.

[l1v3fr33ord1]

FTF-

I have Ford Monaco/HR/Safari product, but our coaches should be similar once the marker light signal hits the Monaco side. So, check fuse 65 and the MARKER LIGHT RELAY in the Front Distribution Panel (the FDP is the black box inside the exterior compartment that's under the driver's left foot). The fuse should be listed in your owner's manual.

[FTF]

Thanks Mark.

[l1v3fr33ord1]

FTF-

You are welcome.

Were you able to find and replace the fuse and relay I mentioned in my post?

[FTF]

Hi Mark,
Yes, I replaced the fuse on #65 location (even though the original fuse checked OK) and I replaced the circuit breaker with a similar adjacent one and nothing - no lights up top. Grrr