I have a Flex-a-lite, Model 210 Dual Fan (w/ thermostatic control) on my 1969 Chevelle - ZZ502 engine set up. I read many of the threads but still not sure if I can use the information to troubleshoot my issue.

The issue is, my battery is draining while the car is running. I followed the electric fan installation instructions and directly hooked up the large gauge red wire from the control moduel to the battery. I did this by splicing in the E-fan red wire and the Alternator red wire to the positive terminal wire that leads to the + terminal on the battery. If I understand the threads correctly, this set up could actually draw down my battery.

I have a Powermaster Alternator but could not find the numbers, so don't know what the output is. Would connecting the large red wire from the control module to the horn relay be better? If so, where on the horn relay should this wire get connected? Also, if the battery gets low enough while running the car, would this cause symptoms such as "cutting out" while driving, or actually "killing the motor" while driving?

Thanks, Ed

Ed, though to troubleshoot from your description. Is the alternator a single wire or 3 wire type?
If it is a 3 wire type your alternator will not have any real output thus the battery will drain.

Can you describe how the alternator is hooked up?

Ron

The alternator is a single wire. From what I can tell, the alt wire runs to the horn relay, then a wire runs to the junction terminal, then I have a wire from the junction connected to the batter + wire. I also have the E-fan power wire spliced in at that point after the junction. Essentially wrapped around the Alt wire from the junction with both connecting to the + battery terminal wire.

I am still looking to find the info on Alt output.....

Thanks, Ed

Move the fan wire to the horn relay, this will help. Make sure the alt wire to horn relay has been upgraded to at least 8 gauge. This will reduce voltage drop between alt and horn relay and help the alt maintain the proper voltage at the horn relay.

Thanks Hank...now I get to show my ignorance about electrical/wiring. I looked up the difference between 3-wire and 1-wire alternators and now believe I could have a 3-wire. The alternator has an internal regulator. I replaced all the wiring in my 69 Chevelle with original wire set up. The alternator has a plug with blue and white wires, then 1 red wire. I have an "alternator conversion adaptor" placed on the end where the 4-wire plug was to connect to the external regulator. Everything else to the juction block is original wire set up.

Would connecting the E-fan red wire to the horn relay still work with this set up?

Thanks, Ed

Thanks Hank...now I get to show my ignorance about electrical/wiring. I looked up the difference between 3-wire and 1-wire alternators and now believe I could have a 3-wire. The alternator has an internal regulator. I replaced all the wiring in my 69 Chevelle with original wire set up. The alternator has a plug with blue and white wires, then 1 red wire. I have an "alternator conversion adaptor" placed on the end where the 4-wire plug was to connect to the external regulator. Everything else to the juction block is original wire set up.

Would connecting the E-fan red wire to the horn relay still work with this set up?

Thanks, Ed

Yes, even better because you have external voltage sensing near the horn relay. This the original design, using the external sensing the voltage reg/alt will try to maintain the proper voltage at the main junction of the electrical system, which is right next to the horn relay. The farther you get away from that point the more the voltage can drop from nominal, depending on wire size and load.