4 years ago I bought a complete TPI (730 ECM) built for my 1972 Corvette. At that time I left the engine driven fan in place. Well last week I ordered a new radiator complete with electric fans. I will have to mount additional relays for these fans. Since the chip was custom for my car as was, how can I tell if the fan/s turnon function is operative (I can send a copy of my .bin file to anyone that will check and let me know). Plus where can I get 2 new pin connectors to connect these relays to my ECM plug?

 

Typically, no one plays with the code for the SD, if it was originally for an F-body or Y-body. All the code to operate both fans are there. All you have to do, is make sure it's wired up properly.

GE8 is the pin for Fan1 and GF8 is the pin for Fan2. You will NOT need a FanSwitch in the Pasenger Head if you wire it this way - the ECM will completely controll it.

If you have concerns about your "custom eprom", consider starting testing it with the stock AUJP bin first (to confirm it works) and then try yours.

Just set the fan "on" temp very low so it will start almost immediately. Then adjust to your own personal preference.

 

Thanx, I got the pin numbers from www.diy----. What I really need are a few of the pin connectors to connect the relay coils to the ECM plug. Where can I get those pins?

 

I get mine from a local "Pick a Part" wrecking yard. I just cut off about 1 foot so I have both the leads, pins and connector.

I also use it to "practice" taking the pins out of the connector.