Relay question

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Zero402

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Im running a 200amp relay that feeds a key on fused distribution block for some accessories. I want to add some LED lights up front and rear. Thought it would be easier to just purchase the premade wire harnesses. The harnesses both come with its own relay. I should be able to just remove these relays and wire it up accordingly, yes?
 

lfhoward

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Im running a 200amp relay that feeds a key on fused distribution block for some accessories. I want to add some LED lights up front and rear. Thought it would be easier to just purchase the premade wire harnesses. The harnesses both come with its own relay. I should be able to just remove these relays and wire it up accordingly, yes?
The relays on the harnesses are for on/off so you will need to keep them. You could draw power from your 200 amp key-on relay if you wanted. It would keep you from running the lights with the engine off and draining your battery.
 

Zero402

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The relays on the harnesses are for on/off so you will need to keep them. You could draw power from your 200 amp key-on relay if you wanted. It would keep you from running the lights with the engine off and draining your battery.
I have the lights on switch though. The 200amp relay turns on the power distribution block. Ill show a pic of the wiring I was going to do. Or do you think its too much of an amp draw running through the switch?
 

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lfhoward

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I think a 200 amp block is stout enough to handle the load. However the switches are not. (They are probably 10 amp switches at most.) The switches should turn on the 2 relays, which can handle the high current of light bars. I would not re-wire the harnesses to eliminate their relays, just attach the existing harnesses to + and - on your 200 amp fuse block instead of directly to the battery. That saves having to string new wires through the firewall, assuming the 200 amp fuse block is under the dash.
 

Zero402

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Ok thanks for your input on this topic. I have a side topic now.

The pre made harnesses are wired to be on or off ( no key on ). If I left the harness alone, hooked it all up the same way as described earlier, being that it runs through the 200amp power on relay, that should still function as I want correct? ( meaning I dont want to accidentally hit a switch in daylight after shutting the Jeep off and it drains my battery ). Cause now the 200amp relay, will only supply power once the key is on. Maybe just answered my own question here.
 

lfhoward

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^^^ Exactly. It will be keyed power only, and no difficult wiring because you use the harnesses. Sometimes the harnesses have fuse holders, sometimes not, but you can make sure the circuits are properly fused at the source in your 200 amp block. I have done a little modding of harnesses by changing to better looking switches before, so if you want to mod them, this is a good way. ;)
 

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