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.

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. You can not directly connect pcm fan control wire to fans. Your 1 source for oem operated pcm controled and universal electric fan harnesses. So your th350 th400 700r early 4l60e early 4l80e etc will need to have one of these crank spacers.

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. Crank spacer is a bit of a misnomer. Psi sells standalone wiring harnesses for gm gen ii iii iv v ls lt based engines and transmissions. Thank you to all that stuck with us during this hectic time.

In this way the electric fan motors are wired in parallel causing the fan motors to spin at high speed. 87 red wire connects to the positive wire on the electric fan. Electric fan guide 100 horsepower anybody can install in gen 3 ls. When the pcm triggers the two additional relays the same voltage flows through each electric fan motor.

Looking for an affordable in stock plug and play wiring harness for your ls swap. Https amzn to 377klrp those fans fit perfect on 68 72 gm a body cars bu. 86 gray white wire goes to the ignition switch. We are currently up and running and shipping from our new location.

The pcm will supply the negative or ground signal to turn on fan relays. The wiring aspect of any ls swap is undoubtedly the most difficult. Lt1 ls1 05 oem flex a lite universal street strip we have you covered. Fan controls 1 2 gm pcm s typically will control electric fans usually 2.

This applies to all transmissions that were originally used prior to the introduction of the ls platform around 1999. Upgrading to gen iii ls series pcm. Wiring dual cooling fans. You must use a relay.

30 other red wire needs constant 12 volt power from the battery. Just an idea on how to wire up electric cooling fans for your vehicle cooling fans. With dual cooling fans there are two methods for wiring up the relay kit.