Ls Swap Dual Electric Fan Wiring

This is based on the draw from the fans if the fans are larger and draw more than 15 amps each it s recommended to install a second relay kit as shown below.

Ls swap dual electric fan wiring.

30 other red wire needs constant 12 volt power from the battery. Psi sells standalone wiring harnesses for gm gen ii iii iv v ls lt based engines and transmissions. Fan controls 1 2 gm pcm s typically will control electric fans usually 2. You can not directly connect pcm fan control wire to fans.

This applies to all transmissions that were originally used prior to the introduction of the ls platform around 1999. Electric fan guide 100 horsepower anybody can install in gen 3 ls. We are currently up and running and shipping from our new location. Most builders are familiar with fabrication techniques trouble shooting and parts swapping to make things work but electronics rise to a much higher level of complexity.

So your th350 th400 700r early 4l60e early 4l80e etc will need to have one of these crank spacers. The pcm will supply the negative or ground signal to turn on fan relays. 86 gray white wire goes to the ignition switch. 87 red wire connects to the positive wire on the electric fan.

Your 1 source for oem operated pcm controled and universal electric fan harnesses. Upgrading to gen iii ls series pcm. In this way the electric fan motors are wired in a series and voltage is reduced causing the fan motors to spin at low speed. Some 2003 ls pcm s tach signal is not strong enough and needs boosted see this link.

Thank you to all that stuck with us during this hectic time. Lt1 ls1 05 oem flex a lite universal street strip we have you covered. In this way the electric fan motors are wired in parallel causing the fan motors to spin at high speed. Wiring dual cooling fans.

Https amzn to 377klrp those fans fit perfect on 68 72 gm a body cars bu. Crank spacer is a bit of a misnomer. Looking for an affordable in stock plug and play wiring harness for your ls swap. 85 black wire.

Just an idea on how to wire up electric cooling fans for your vehicle cooling fans. You must use a relay. When the pcm triggers the two additional relays the same voltage flows through each electric fan motor.