Auxiliary lights failed - relays or switches?

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edmund108

Member - Posts: 3

Joined: May 23, 2017

Location: United Kingdom

Posted: May 23, 2017 at 10:58 AM / IP Logged

I acidentally shorted the common to the ground while messing with one of three switches set up in my dash for auxiliary 55w lamps on my truck (front, rear and tub of the pickup). The 30 amp fuse tests good. I've tested the three (four prong) relays and they seem to function well: power and ground shows a click when given 12V AND the two other prongs show no resistance with the relay still connected to power. However there's no power going to any switch from any of the relays.

Not surprisingly the LEDs on the switches don't light up when they're turned on. The switches all show between 30 and 45 ohms resistance, on the multimeter's 200 ohm setting with the switches turned on. Could it be that I've blown all three switches? Love to understand what happened there.

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edmund108

Member - Posts: 3

Joined: May 23, 2017

Location: United Kingdom

Posted: May 23, 2017 at 11:00 AM / IP Logged

ps Land Rover 110 Hi Capacity Pick Up, 1989 / Discovery 300TDI engine (conversion)

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edmund108

Member - Posts: 3

Joined: May 23, 2017

Location: United Kingdom

Posted: May 23, 2017 at 11:01 AM / IP Logged

pps I tested the relays on the bench with a spare battery, and not in the vehicle.

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