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Technical Support / Headlights not working??
« Last post by RogerMilne on October 12, 2025, 02:33:26 PM »So, it's a little more in depth than just not working, but I'm trying to eliminate the easy stuff first before I ask more deeper technical assistance.
So the previous owner has trashed the wiring on this RV. In an attempt to upgrade things over the years he's cut and spliced wires throughout the electrical system. I'll leave it at that for the moment, but will digress in another post about his hack job.
So headlights don't come on at all. Parking lights do come on and so do turn signals.
Before I ask the obvious, I will throw out there part of the potential issue was his cutting wires for the Low and High beam lamps, in order to install LED bulbs over the halogens and what appears to be aftermarket headlight units. Although the wires he cut seem to only be in order to facilitate the plug differences, NOT the functionality of the lamps themselves.
My question at this point in the trouble shooting, is this??
According to the wiring schematic, it's pretty straight forward via a couple different fuses (which I've checked) to the smart wheel then to a couple VCB blocks to a 5 pin connector at the headlight units. again barring his cutting, the DRL block is hanging in the wind, in the front bay area where the generator is.
So the wiring schematic shows the DRL block in parallel to the wiring circuits for the Low and High beams, so if he disconnected it from the original headlight units, would this cause any issues with the operation of the lights or is the fact the new lamps aren't being used as DRL's not a factor.
I need to eliminate the fact the DRL circuit isn't somehow affecting my diagnosis, before I move to the next issue in the troubleshooting.
Sorry this is a bit long winded for such a short and easy question, but it'll help fill in the gaps when I ask the next couple of questions with my train of thought and troubleshooting.
So the previous owner has trashed the wiring on this RV. In an attempt to upgrade things over the years he's cut and spliced wires throughout the electrical system. I'll leave it at that for the moment, but will digress in another post about his hack job.
So headlights don't come on at all. Parking lights do come on and so do turn signals.
Before I ask the obvious, I will throw out there part of the potential issue was his cutting wires for the Low and High beam lamps, in order to install LED bulbs over the halogens and what appears to be aftermarket headlight units. Although the wires he cut seem to only be in order to facilitate the plug differences, NOT the functionality of the lamps themselves.
My question at this point in the trouble shooting, is this??
According to the wiring schematic, it's pretty straight forward via a couple different fuses (which I've checked) to the smart wheel then to a couple VCB blocks to a 5 pin connector at the headlight units. again barring his cutting, the DRL block is hanging in the wind, in the front bay area where the generator is.
So the wiring schematic shows the DRL block in parallel to the wiring circuits for the Low and High beams, so if he disconnected it from the original headlight units, would this cause any issues with the operation of the lights or is the fact the new lamps aren't being used as DRL's not a factor.
I need to eliminate the fact the DRL circuit isn't somehow affecting my diagnosis, before I move to the next issue in the troubleshooting.
Sorry this is a bit long winded for such a short and easy question, but it'll help fill in the gaps when I ask the next couple of questions with my train of thought and troubleshooting.