Electric Fan Help!

[bulldog5.3]

last week i installed the 05' E-fans and 34" radiator. So far they have worked great. It is hooked up with only the passenger side fan operating on high. I ordered the 145A alternator in advance because of the extra electrical drag that the fans will cause when they kick on, BUT they kick on and off every 5-10 seconds and it drains my Volt gauge down 50%, ( Are THEY SUPPOSE TO DO THAT?)my lights dim at night and it seems like the fans aren't hooked up right. I know i did them right, hell You really can't hook them up wrong. I replaced the stock 105A alternator today with 145. The extra drag just about killed the 105A( the bearing was squekin' like crazy). It made the bearing go bad in it in like 5 days. I am afraid that the fans will do the same to the 145A, because it doesn't seem to be that much better than the 105A. It keeps the battery charged better, but kicks down the gauge 50% like my old alternator.

I need some techncal help before i jack somethin' up.
Thanks bulldog5.3

[COWL327]

I have read or heard that you mite have a bad relay or it is wired wrong.If you can get a wiring diagram,check your connections. USE2BFO had this problem.check out electrical post by his user name.The drain sounds like a relay is plugged in wrong or not working good luck and keep us posted.

[COWL327]

here it is http://forum.ls1truck.com/index.php?showtopic=4795

[bulldog5.3]

It drops about a one volt when the fans kick on. But, both fans don't work only the passenger side. it was about 12 volts and when fans are off it is like 14.5 volts. it just drags down the alternator badly.

I just switched the relays around, same result. They come on and off every five seconds and alternator goes to about 50%.

WHY IS IT PULLING MY ALTERNATOR SO FAR DOWN????
I have no clue what to do????

ALLEN IF YOUR READ THIS, FEEL FREE TO POUND THE KEYBOARD.

THANKS, BULLDOG5.3

[RedHeartbeat]

If the circuits are protected with a thermal breaker, sounds like you have a short and it cycles on and off as the breakers cools and resets.

[bulldog5.3]

That sounds about right, my buddy said every time the a/c cycles my fans come on then off.
Just don't know how to fix it?

[gearheadnate]

Originally posted by bulldog5.3@Oct 22 2005, 12:44 AM
last week i installed the 05' E-fans and 34" radiator. So far they have worked great. It is hooked up with only the passenger side fan operating on high. I ordered the 145A alternator in advance because of the extra electrical drag that the fans will cause when they kick on, BUT they kick on and off every 5-10 seconds and it drains my Volt gauge down 50%, ( Are THEY SUPPOSE TO DO THAT?)my lights dim at night and it seems like the fans aren't hooked up right. I know i did them right, hell You really can't hook them up wrong. I replaced the stock 105A alternator today with 145. The extra drag just about killed the 105A( the bearing was squekin' like crazy). It made the bearing go bad in it in like 5 days. I am afraid that the fans will do the same to the 145A, because it doesn't seem to be that much better than the 105A. It keeps the battery charged better, but kicks down the gauge 50% like my old alternator.

I need some techncal help before i jack somethin' up.
Thanks bulldog5.3

I recommend changing the wire from the alt to the battery cable junktion It is to small for the amps the 145 puts out. Try a 4 gauge cable.

[bulldog5.3]

let me know if you find the problem?

[COWL327]

We are gettin close...maybe something real simple......We will keep it updated

[RedHeartbeat]

You should be able to use it as-is, just remove the grounding wire from the a/c circuitry and move it to pin 33.