Re: Wiring up spotlights.!?
Make sure your relay is rated at least 30amps, I have four 55watt lamps at roof level with the relay feed wire connected to to main beam via a dash mounted switch, if you flash your main beam quickly IE flashing somebody out, the relay has to latch in under load then drop out again, this can cause the relay to weld in (stick in the on position).
This occured a few times to me, if it does you cant turn the lamps off, even if you turn the dash switch off! you will have to pull the power fuse or give the relay a clout with a screwdriver to break the contacts!
I cured the problen by fitting an oversized relay, I found one on fleebay rated at 80amps for a fiver.
Another little tip regarding the size of the cables, I took two lives and two negatives up to the roof bar, I connected two lamps on one pair and two lamps on the other pair, then under the bonnet I crimped both reds together into one yellow spade terminal (fit to the relay) and connected the two black negatives to a realy good earth (inportant).
You can take the relay trigger wire from the back of the instrument panel, connect a cable to the blue main beam warning lamp (this goes live when main beam is on) this can be a fairly thin cable, then break it near to the blue lamp with a 1amp fuse, run this cable to a convenient location where you want to mount a simple on/off switch, mount the switch and wire the thin cable through it, now run this cable through the bulkhead to the relay (if you have mounted the relay under the bonnet).
Then, if the switch is on and you energise main beam the relay should click on.
Now run a feed from the battery (with heavy cable 4 or 6mm) to the relay, fit a 25amp fuse as near to the battery as possible.
TIP, don't use household cable, it is solid conductor, motor or load cable should be multi-stranded and the more strands the better (that's why jump leads are heavy multi-stranded cable) they are called TRI-RATED cable.
Good luck, message me if I can be any more help. Oh Yes, dont get hold of the bulbs by the glass, the slightest bit of grease (even human) will blow the lamp apart when up to temperature, hold them by the matal base only!
Gordon. (sprarky to me mates)
Last edited by Gordo 90; 2nd-January-2011 at 00:04.