Wiring Gurus need help with vintage air wiring

[72Z/28]

Originally Posted by LSX67

Connect circuit breaker (red wire) to battery positive, connect the white wires to battery negative.

You can use bubble sided tape to mount it on the side of your battery if you don't want to drill holes (there's a lot of options). It's not that important where you mount it, as long as it's close to the battery. Also, if you extend the wires make sure to use the same gauge wire then solder an heat shrink the connections. I hope this helps I am not very good at giving directions but I have installed a lot of these units.

Thanks a lot man you explained it well, really appreciate it. I did go through the wiring on both fans, and I found out that there were two fan wires from the PCM connected to 40/30A relays and two spal fans are connected to two 40/30A relays. In other words I have got 4 relays for the fans, all of which are connected to a 70AMP MAXI FUSE.

Is it OK to have a common MAXI FUSE for the 4 fan relays? I am not a wiring guy, so not sure about this set up.

[LSX67]

Originally Posted by 72Z/28

Thanks a lot man you explained it well, really appreciate it. I did go through the wiring on both fans, and I found out that there were two fan wires from the PCM connected to 40/30A relays and two spal fans are connected to two 40/30A relays. In other words I have got 4 relays for the fans, all of which are connected to a 70AMP MAXI FUSE.

Is it OK to have a common MAXI FUSE for the 4 fan relays? I am not a wiring guy, so not sure about this set up.

I am not sure why you have 4 fan relays? A Spal wiring harness has 2 fused relays that connect to a battery source ( yellow wire one for each fan). 2 orange wires that connect to 12v ignition, 2 grey wires that connect to PCM or temp sender. You can have several relays on one maxi fuse because the relay carries the load. (www.spalusa.com) detailed wiring diagrams on web site, check it out.

[72Z/28]

Originally Posted by LSX67

I am not sure why you have 4 fan relays? A Spal wiring harness has 2 fused relays that connect to a battery source ( yellow wire one for each fan). 2 orange wires that connect to 12v ignition, 2 grey wires that connect to PCM or temp sender. You can have several relays on one maxi fuse because the relay carries the load. (www.spalusa.com) detailed wiring diagrams on web site, check it out.

The fans came mounted on the radiator which I believe it is Ron Davis radiator. I bought the car with this setup and frankly speaking I am not sure how the idiot who wired the car did the wiring of the fans because the relays and fan wires are not the ones supplied by Spal Fans.

Thanks for the input on the fan wiring though, and I am going to go the wiring schematic of Spal Fans once again