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How to install aftermarket lighting.

Installing aftermarket lighting is very simple. The following setup is safe up to a pair of 150W lights.

What you need:
  1. Enough 12 AWG (or larger) wire to go from the battery, to the relay, to the lights and to ground. (More than 6', use 10 AWG).
  2. Enough 16 AWG (or larger) wire to go from the switch to the relay (which should be around the battery somewhere) and to ground.
  3. A standard 12V 30A relay (or larger).
  4. A 30A fuse and fuse holder.
  5. A switch (can also be activated off stock vehicle components instead.)
What to do:
  1. Remove the ground wire from the battery.
  2. Figure out where the lights are going and the safest but shortest path to wire from the battery to those lights.
  3. Figure out where along that line (closer to the battery) the relay can reside. A small movement for a much better relay location is always possible also. Relay should be close to the battery, in the engine compartment.
  4. Wire in the fuse within the first 18" of the wire at the battery between the battery and relay pin 30.
  5. Finish the 12 AWG wire run from pin 87 of the relay to the lights, and ground the lights to the chassis.
  6. Find a 12V source you want to use for the switch. This can be any 12V signal wire. Minimal current is needed so you can tap off of headlight output, keyed signal wired, etc.
  7. Run a small wire from there to an external switch (Unless using an already existing factory switch, it should already have power. Skip to the next step.)
  8. Run wire from the switch output to pin 85 of the relay and ground pin 86 of the relay.
  9. Reconnect the ground wire at the battery and test the lights.
Here is an electronic schema to give you a visual picture:

Notices:
All Content Copywright 2003-2006 Christopher Stiefel. All Rights Reserved.
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