Headlight good. Driving lights not working

Bedifferent said:

Are you actually getting power to the switch? I believe the wire colors according from my diagram are.... blue/black stripe (power in) and blue (power out). I believe the wiring is accessible in the headlight shell. There are two harness connectors in my headlight with a lot of wires....check those. Separate the connectors and reseat them. You can check for power in the wires as mentioned by using a very small needle/pin and poke it thru the wire insulation. Put the positive tester lead on the pin and the neg tester lead to ground. DON'T TOUCH the pin against the headlight shell or ground so as to create a short while testing. Just some suggestions.

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Thanks for the info on wire color and pin. Hot wire to switch is blue. Return from switch is blue/black. Schematic says V for violet I guess. Power to light good. Power to relay good. Relay engaging good. No power out of relay to lamps. Opened relay and had corrosion on coil leads. Sanded contacts on coil and other contact points. Now works great.

FYI for those that may make the same mistake I did. When I changed this same relay out to a 40amp relay, I had it turned down with the wires pointing up. This allowed moisture to get in to the relay and cause corrosion. Now I have it and the relay next to it on top. I ended up having to clean that relays contacts as well. Not sure what it is for.

slidderhd said:

Thanks for the info on wire color and pin. Hot wire to switch is blue. Return from switch is blue/black. Schematic says V for violet I guess. Power to light good. Power to relay good. Relay engaging good. No power out of relay to lamps. Opened relay and had corrosion on coil leads. Sanded contacts on coil and other contact points. Now works great.

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Don't you just hate it when you do something like move the handlebar but the problem is totally unrelated? It sounds like you did a good job troubleshooting. Poor contacts in the relay.....did you replace it with just a standard generic relay? I plan on carrying a starter relay and a standard relay with me on a trip. With five total relays on my bike I need a little peace of mind. A simple fix if you've got one with you. Glad you found the problem...I hope we were all of some help.

Glad you found it and a simple fix!

Bedifferent said:

Don't you just hate it when you do something like move the handlebar but the problem is totally unrelated? It sounds like you did a good job troubleshooting. Poor contacts in the relay.....did you replace it with just a standard generic relay? I plan on carrying a starter relay and a standard relay with me on a trip. With five total relays on my bike I need a little peace of mind. A simple fix if you've got one with you. Glad you found the problem...I hope we were all of some help.

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The 40amp relay is only a year old and put in due to comments on this forum. I just cleaned the corrosion out and sanded the contacts. The 30amp next to it was not working either, but I don't know what it was for. I cleaned it also.

slidderhd said:

The 40amp relay is only a year old and put in due to comments on this forum. I just cleaned the corrosion out and sanded the contacts. The 30amp next to it was not working either, but I don't know what it was for. I cleaned it also.

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The starter relay is a 5 pin relay (called a changeover relay) that allows for starting as well as disengaging the headlight during cranking. All the others are 4 pin relays....all of the 4 are the same part number according to Triumph. Fuel pump relay, cooling fan relay, engine management relay and the auxiliary lighting relay. The only one, to my knowledge, that would not effect the actual starting of your bike, (aside from your auxiliary light relay), would be the cooling fan relay. I can't imagine it wouldn't throw a code and turn your check engine light on or be an issue keeping your engine from overheating if it was not working. I don't know if the Triumph relays use a protect resistor or diode as I have been unable to cross reference the numbers on them and the circuit diagrams do not reflect their true construction.

When I opened the oem relay, I noticed resistors in it.