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COA

COA

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Santa bought me a new a bar with twin wipac 100w spots. He was also kind enough to buy a preprepared wiring set up as he knows I am an idiot when it comes to electrickery.

The wiring provided attaches to the positive terminal of the battery, has a blade fuse (assumed 30 amp would be ok), then runs to a relay, from the relay comes a male three wire, female three wire, and two wires one for each spot. I took the female off the back of the headlight bulb and plugged in the new male from the relay into the old female. I then plugged the new female from the relay onto the back of the headlight bulb. The two wires running to the spots connect with bullet connectors and have a snug fit.

When I switch on the headlights the old headlights work and full beam works on the old headlights but he spots don't come on. The voltmeter says there is no current at the end of the red and black wires that connect to the spots.

Is a 30 amp fuse the wrong thing to use? What else can I do?? What tests would you run to work out where the problem was?

Thanks
 
Forgive me if I seem a bit thick ... You have a relay with 8 terminals on it???

If you have a look at the relay, you should find on the circuit diagram (or in the INSTRUCTIONS that came with it) that one MALE pin goes to EARTH, the one opposite goes to the SWITCH and one of the others goes to the BATTERY FEED via a FUSE, with it's opposite going out to your SPOTS.

However, with some of the newer smarty-types, you might find that you have a DOUBLE POLE relay, with a single feed and both poles to the spots are switched!

Have you RTFI??
 
Hi,, the relay has four pins but it has eight wires because each clip that connects to the relay has two wires attached to the clip. The wiring kit was provided by the company that I bought it from called "bolt on bits" and I followed the very comprehensive instructions.

What is RTFI??
 
I did read the instructions before I posted.......also spent best part of a day making sure all the connections were really tight. I hate electricity !!
 
3.5 efi said:
what you using for an earth?
Click to expand...

As far as I can work out there is no specific earth for the spot lights. The wiring "loom" that was sold as ready to fit has a direct wire to the battery and it then introduces a relay between the connector that was on the back of the near side headlight and the headlight unit.

When the lights are on low beam the relay is off and when the lights are switched to high beam I assume that the relay opens and the spots connect to the battery. I had assumed that the headlight had an earth already and that this earth was also being used for the spots.

There was no mention of earth in the very detailed instructions and there is no wire that I could use for that.

Does it sound plausible that the headlight earth could be used for the spots?
 
If you have a single wire to each of the spots, there should be some way of earthing them otherwise they won't work! It is common to run from the spots back to a common earth on the body ... even if you have to create one using a bolt! Do not couple them into the headlamp earths as that will overload the existing wiring!!

If your instructions don't tell you where to connect to the relay, take a couple of bits of wire, one + and one - and touch them to the pins opposite each other. One pair should make the relay 'click' and the other pair will give you nothing.

The pair that makes it click are the ones used for switching the relay whilst the other pair are the load which go from your + on one side to the lights on the other.

Hope this helps.
 
Thanks for that advice. I did find the fault which was a dodgy fuse holder. When I cut it out and hooked the wire up to the battery direct the spots worked fine. Replaced the fuse holder and everything worked fine.

Guess sometimes a simple part makes these things work or not. That's why I hate electricity!
 
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