Ls Swap Dual Electric Fan Wiring

30 other red wire needs constant 12 volt power from the battery.

Ls swap dual electric fan wiring.

Looking for an affordable in stock plug and play wiring harness for your ls swap. You must use a relay. 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. Electric fan guide 100 horsepower anybody can install in gen 3 ls.

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. We are currently up and running and shipping from our new location. Https amzn to 377klrp those fans fit perfect on 68 72 gm a body cars bu.

Some 2003 ls pcm s tach signal is not strong enough and needs boosted see this link. 87 red wire connects to the positive wire on the electric fan. Psi sells standalone wiring harnesses for gm gen ii iii iv v ls lt based engines and transmissions. Crank spacer is a bit of a misnomer.

The wiring aspect of any ls swap is undoubtedly the most difficult. Wiring dual cooling fans. 86 gray white wire goes to the ignition switch. In this way the electric fan motors are wired in parallel causing the fan motors to spin at high speed.

Fan controls 1 2 gm pcm s typically will control electric fans usually 2. The pcm will supply the negative or ground signal to turn on fan relays. With dual cooling fans there are two methods for wiring up the relay kit. So your th350 th400 700r early 4l60e early 4l80e etc will need to have one of these crank spacers.

Upgrading to gen iii ls series pcm. Thank you to all that stuck with us during this hectic time. Just an idea on how to wire up electric cooling fans for your vehicle cooling fans. 85 black wire.

When the pcm triggers the two additional relays the same voltage flows through each electric fan motor. This applies to all transmissions that were originally used prior to the introduction of the ls platform around 1999. Your 1 source for oem operated pcm controled and universal electric fan harnesses.