According to my 2000 Ford Excursion EVTM manual there is no relay for the headlamps for either the low or high beams, each is supplied voltage from the Mutl-Function switch on the steering column. There is a separate fuse for the High Beam circuit located in the Central Junction Box, Fuse 16.
I replaced the Multi-Function Switch, but that did not resolve the problem. I am running out of ideas now, so all help is highly appreciated!
I can flash the high beam, but not turn they permanent on pushing the MFS forward. I have checked the fuse 16 and it seems to be OK. If I remove it I can not flash the high beam. I can only flash the high beam when the main switch for the head light is turned on.
Terminal 12 is hot when the MFS is in the High Beam position. Terminal 13 is hot when the MFS is in the Low Beam position. Terminal 15 is supplied power through the Main Light Switch via Fuse 10 in the battery junction box. Terminal 15 supplies power for Low and High Beam operation.
Fuse 10 also supplies power to Terminal 196 on the MFS. When using the Flash function the MFS routes power from Terminal 196 to Terminal 12.
The path for High Beam/Flash is exactly the same from the MFS Terminal 12 to the headlamps. If there was a problem with the MFS main power input, Terminal 15, then you would have issues with both the low and high beams not working.
It's time to break out a meter to verify the "new" MFS is good. Hard to believe two in a row would be bad.
Those diagrams you posted are for an '02, I am not sure if the OP's 2000 is the same. Plus I do not see a relay for the High Beams in said diagrams. There is one for the fog lamps, but not High Beam. The second diagram does mention a relay for the Daytime Running Lamps (DRL), but nothing for the High Beam.
Perhaps I cannot see the forest through the trees?
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