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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20308  
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400w load total @ 12.2v = 32.78A Current Approx
You should be able to use 1mm2 cable for each individual spotlight wiring in parallel, but the supply I’d recommend 4mm2. 1mm2 supplying each spotlight, but the supply incoming 4mm2. Use 4mm2 for the main ground also. Automotive thinwall cable would be ideal, don’t forget to use a 40A make break 4 pin, type B, Normally Open contacts, Relay, and I’d fuse at 35Amp ATO within 20inch max of the battery live or source of the power supply. Fusing is safety critical and is a must. Regards fusing, I’d suggest an ATO inline fuse holder with a cap and relays wise Durite do very good ones, with Diode 4 pin make and break would be ideal and follow online generic wiring diagram. Then from there you can work out where you want to take your trigger from, I’d recommend from main beam live, but you can use a switch or both if you want but will be more involved with wiring it all up. Hope that helps. Supply input / output: Relay pin 30, input fused @ 35A ATO 4mm2. (From fused battery live or other power source). Relay pin 87, switched output 4mm2 (to spotlights). Trigger, turning relay on and off: Relay pin 85 negative ground Relay pin 86 live incoming trigger, from main beam as an example. Heatshrink terminals are probably best for waterproofing at the spotlights. ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️ |
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4th Feb 2024 9:01pm |
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| NFIN02 Member Since: 17 Feb 2022 Location: Londonderry Posts: 96 
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Thanks for the info. I literally just bought a few metres of 2x28 flat twin core cable to hopefully start wiring up parallel. Hope I am on the right track?
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5th Feb 2024 2:58pm |
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| NFIN02 Member Since: 17 Feb 2022 Location: Londonderry Posts: 96
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Hi all, I am doing something silly here I know but I need someone to put set me on the right path. I eventually got my 90 back on the road and took the challenge on of wiring up the front spots as per previous post. I have my spots wired up and down into the battery box with the appropriate wire size etc. got the online fuse fitted on the red/live line about 6 inches from battery. Got my 4 pin relay, and attempting to wire up by
Relay pin 30 power in. Relay pin to spotlights Relay pin 85 negative ground - just to door post Relay pin 86 connected to existing switch on dash but switch appears to be power off another switch. Am I being silly or do I need more than one ground? I am just getting a little confused about negative wire from lights, negative terminal from supply. Doo ground both of same locatio?? |
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28th Aug 2024 5:35pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20308
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One for the Relay if you are using a live in trigger, one ground for the spotlights. So long as both are on a good common ground that is clean and low resistance all is well with that.
Unless the Relay has a diode on the trigger coil, you can use the coils for live or negative switch. ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️ |
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28th Aug 2024 6:09pm |
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