Ls Swap Fan Wiring

Fan controls 1 2 gm pcm s typically will control electric fans usually 2.

Ls swap fan wiring.

The dlc or obdii port is a must have for any ls swap and it is often overlooked when retrofitting a stock harness. Psi sells standalone wiring harnesses for gm gen ii iii iv v ls lt based engines and transmissions. You can buy a stand alone harness have a new harness custom built or rewire the harness that came with your ls engine. 86 gray white wire goes to the ignition switch.

Camaro and firebird ls swap. Make sure you grab the wiring harness from the donor car. Your 1 source for oem operated pcm controled and universal electric fan harnesses. Lt1 ls1 05 oem flex a lite universal street strip we have you covered.

85 black wire. You can not directly connect pcm fan control wire to fans. Wiring harness and wiring guide gm ls series pcm ecm. If you don t you have to head back to the salvage yard or take your chances on ebay.

Thank you to all that stuck with us during this hectic time. You must use a relay. Photo courtesy street performance. Chassis and suspension stroking options for big inch ls engines how to control your gen iii 3 v 8 ls engine ls swaps.

It seems for many people that the scariest part of the modern engine swap is the wiring harness. When doing an ls swap you have three options in integrating the engine wiring harness successfully. Wire it once and wire it right with painless. Some 2003 ls pcm s tach signal is not strong enough and needs boosted see this link.

These harnesses include the gen ii lt1 lt4 gen iii 24x ls1 ls6 and vortec truck engines as well as gen iv 58x ls2 ls3 ls7 vortec and gen v lt. 30 other red wire needs constant 12 volt power from the battery. In most cases people end up having the harness that came with their ls engine rewired. The pcm will supply the negative or ground signal to turn on fan relays.

Looking for an affordable in stock plug and play wiring harness for your ls swap. Exhaust and induction guide. 87 red wire connects to the positive wire on the electric fan. When you are doing a build with the ls family of gm engines the idea is to end up with a.