How To Test/Remove Headlight Switch?
My headlights stopped working, no high or low beams. Running lights, brake lights, turn signals, dash lights and overhead light (with dimmer) all work properly. This is a 1999 Winnebago on a Freight...
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Thanks - got the switch out. I think it’s ok (see below). I’m back to looking for the fuse/relay/circuit breaker that controls the headlight circuit. Has anyone found this on a late 90’s Freightliner XC chassis (preferably from Winnebago)?
Here’s how I tested the switch - there is one full time powered pin, one ground (grounded to the switch body), and 6 other pins with wires going to them. With the switch removed, I tested continuity across the various pins.
With the switch shaft pushed in all the way (off), I got continuity across one set of pins – this had to be the dome light. With it pulled out half way, I got continuity across 3 pin sets (must be running lights, dash lights, and something else). With it pulled out all the way, I got continuity across the same pins as when halfway out, plus one more set (must be the headlights). All this makes me think the switch is good.
I must be overlooking something obvious. Back to the Freightliner wiring diagram - the light switch feed an “auxiliary light relay”, but it shows the tail light circuit going to this relay. The headlight circuit goes to the dimmer switch, then to the headlights. I don’t think the relay I found controls the headlight circuit, which means I haven’t found a fuse or circuit breaker for the headlight circuit.
Suggestions?
Here’s how I tested the switch - there is one full time powered pin, one ground (grounded to the switch body), and 6 other pins with wires going to them. With the switch removed, I tested continuity across the various pins.
With the switch shaft pushed in all the way (off), I got continuity across one set of pins – this had to be the dome light. With it pulled out half way, I got continuity across 3 pin sets (must be running lights, dash lights, and something else). With it pulled out all the way, I got continuity across the same pins as when halfway out, plus one more set (must be the headlights). All this makes me think the switch is good.
I must be overlooking something obvious. Back to the Freightliner wiring diagram - the light switch feed an “auxiliary light relay”, but it shows the tail light circuit going to this relay. The headlight circuit goes to the dimmer switch, then to the headlights. I don’t think the relay I found controls the headlight circuit, which means I haven’t found a fuse or circuit breaker for the headlight circuit.
Suggestions?
