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Aug 26, 2004 21:21:12 GMT
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how to wire a 4 pin relay into a fog light circuit?
I'm trying to put a purple axle light on the viva.
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Assumption is the mother of all f**k ups
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any one know....BenzBoy
@benzboy
Club Retro Rides Member 7
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Aug 27, 2004 19:18:25 GMT
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Is it a standard relay? The one I used for my electric fan was a Ford item but I found that the universal ones have the same connectors. These were numbered 30, 85, 86, and 87. This is how I hooked up the electric fan - you can translate this to your application.... 30 - high amp fused power supply. 85 - Earth (body) 86 - Low amp positive (through the thermo switch) to + source (the horn in my case) 87 - To the fan The fan is then earthed to the body. From this I would think that your 86 would go to your light switch. 87 would go to your fogs and then earthed. 30 would go to your power supply (high amp) and 85 to earth. I'm not saying this is 100% what you should do (just covering myself in case your car catches fire!  ) but this is how I did it 6 months ago and my fan is still going strong (and my car hasn't caught fire!) Hope this helps! |
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Davenger
Club Retro Rides Member
It's only metal
Posts: 7,272
Club RR Member Number: 140
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any one know....Davenger
@dminifreak
Club Retro Rides Member 140
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Yeah, he's right, 2 power leads and 2 leads to activate it.
Piece of cake
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Aug 30, 2004 15:04:57 GMT
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cool cheers for that guys.
i will give it ago next weekend as I'm out all next week with work.
nice curse word up in Cardiff!!!
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Assumption is the mother of all f**k ups
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Aug 30, 2004 18:33:27 GMT
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this is what i have done and it doesn't work.
relay:
30 - battery live + 15a fuse
85 - Earth
86 - to swich
87 - from lamp
swich:
pin s1 - from pin 86
pin 2 - to lamp
lamp:
pin 1 - from pin s1
pin 2 - to pin 87
i have 2 spare relays which i have tried and also tested it on the air horn relay.
ARHHH wires help!!!
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Assumption is the mother of all f**k ups
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any one know....BenzBoy
@benzboy
Club Retro Rides Member 7
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Aug 30, 2004 18:43:51 GMT
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I think the pin 1 on your lamp needs to go to earth (body)... we're reaching the outer limits of my electronics expertise here though! Never my strong point!  Your switch needs to go to a low-amp live instead of to the lamp. The low amp circuit then activates the relay which completes the high amp feed to the lamp. All the relay does is stops you having to put a switch directly into the high amp circuit as you'd need a pretty hefty switch for that! |
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Last Edit: Aug 30, 2004 18:47:10 GMT by BenzBoy
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Aug 30, 2004 21:45:59 GMT
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i think i understand.
can you do a little pic for me please so i can get my head around it.
a picture tells a thousand words!
cheers
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Assumption is the mother of all f**k ups
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any one know....BenzBoy
@benzboy
Club Retro Rides Member 7
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Aug 31, 2004 10:43:28 GMT
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Hope this helps....  Fuse sizes and stuff will have to be suited to your application. Thicker lines on the diagram is where I used 25A wiring. Not sure if the earth needs to be heavy duty but I did it anyway, just to be safe. I think I also put a 10A fuse in line on the switch lead. Not sure if this is necessary but just to be on the safe side  |
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Sept 3, 2004 13:53:53 GMT
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cheers, that looks better.
i will give it a go at the weekend
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Assumption is the mother of all f**k ups
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Sept 7, 2004 20:55:09 GMT
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yeah!!! got it working.  strange colour tho, i used the digi camcorder without a flash so i put it on night vision |
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Assumption is the mother of all f**k ups
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Davenger
Club Retro Rides Member
It's only metal
Posts: 7,272
Club RR Member Number: 140
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any one know....Davenger
@dminifreak
Club Retro Rides Member 140
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Sept 8, 2004 10:34:41 GMT
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Looking good mate, can't wait to see it in real life  |
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) but this is how I did it 6 months ago and my fan is still going strong (and my car hasn't caught fire!)
