I feel this was to address a problem with the 3.8 JK's transmissions overheating. The trans temp sensor is connected in series with the neutrtal saftey function, odd. The fan control runs through the transmission control module and will not allow the engine to start with high trans temps. Replace this componant if you replace the fan motor, it can be a source of problems.Īs a side note we did out first 12' LS swap, I must say the 12' fan is very powerful and compact, but it is variable speed. The 5 wire voltage divider(fan resistor) on the shroud enables a one speed fan to have two speeds. It is best to use the PCM to control fan speed for engine cooling as well as to control a/c condenser pressures. AMP Research Power Steps Jeep Wrangler Running BoardsWe have the latest innovations in accessories for the Jeep Wrangler.

Pull the relay and inspect, if the contacts are burnt replace the connector and reassemble with dielectric grease. It is common for the high speed relay terminals to get hot and melt. The next step is to check the Pulse Width Modulated (PWM) fan relay (if you havent done so yet), go to: FAN RELAY TEST 1. This tells you that the fan motor is OK and will not fry the new PWM fan relay when you replace it (if applicable). The low speed fan relay is in the TIPM and the high speed fan relay is behind the driver headlight. CASE 1: Your test result resulted in a calculation of under 40 amps. ZELDA BLACK AND GOLD TCG ULTRA PRO DECK PROTECTOR CARD SLEEVES FOR MTG.

Click to expand.Assuming this is not a 12'-13' there is two relays which control the fan. Finder 46.61.8.024.0054 Relay 16 Amp 250 Volt Coil USED.

Jeep amp steps relays