ok i am trying to do a manuel fan switch going by your obd1 diagrame but what i need to know is off what of the ecu do i connect to what bundle of wires the bundles are labled z b and all that. what color wires is it also i am so confussed and i need this fan switch to work bc my sensor is out to turn them on and i need fans untill i can get the sensor

 

1 you can use this site to find out where to tap into the relay grounds http://users.oco.net/xero/fanmod/

2 if you mean your coolant temp sensor is bad and teh fans are not coming on cause of it you need to be careful. that sensor is also a part of fuel control. I'm sure you will wanna hurry and get that replaced

 

See my reference to connector C100 in this post:http://web.camaross.com/forums/showt...51#post2094651

 

ok i got the sensor 25 dollars im putting it on i hope this will fix it

 

if not just go back to that link that Rob just posted. has a lot of info for the fan issue