My Nelson fan harness is eating relays
#31
Originally Posted by BlownChevy
installed the 145 amp today, seems to be a little better on the draw.....
we will see.
GM part# 10464476
I noticed that one ONE fan is on with the A/C turns on if the temp is below where it is set to come on....does that make sense? LOL
we will see.
GM part# 10464476
I noticed that one ONE fan is on with the A/C turns on if the temp is below where it is set to come on....does that make sense? LOL
PCM (temp) trigger only - both fans on low
A/C trigger only - one fan on high, one fan off
PCM and A/C trigger - Both fans on high
#34
blownerator
iTrader: (20)
Originally Posted by thunder550
Pre-05 trucks only have 2 triggers to work with (a/c +12V and PCM ground for temp). The only way I can think of would be to do some kind of either time delay or slow-ramping relays, or to go to a standalone variable speed controller.
the stand alone may be the only way. All I know is there is a horrible "shock" on the charging system with this set up....one I am not willing to live with.
#35
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The 05 fans can draw up to 75 amps of power. I have put a DC shunt and from one fan on low and kicking the A/C on then both fans on high it drew 75 amps. The Nelson harness is fully capable of supporting this(not for a constant high amperage). After the initial start up the amperage levels off to around 7-8 amps both on high.
I have the Nelson harness with the 05 Fans. I know this may sound odd but you may have too much amperage in your system for the relays. I have the stock 105a alt and can only make a small amount of amperage, where as you have a high capacity to put out amperage, hence you can put the full power to the fans to turn them on where i cant possibly over amp the relays, you can. this may be the problem. Not sure tho.
Does this make sense?
I have the Nelson harness with the 05 Fans. I know this may sound odd but you may have too much amperage in your system for the relays. I have the stock 105a alt and can only make a small amount of amperage, where as you have a high capacity to put out amperage, hence you can put the full power to the fans to turn them on where i cant possibly over amp the relays, you can. this may be the problem. Not sure tho.
Does this make sense?
#37
what a rush!
iTrader: (8)
Originally Posted by 04BlackSilverado
The 05 fans can draw up to 75 amps of power. I have put a DC shunt and from one fan on low and kicking the A/C on then both fans on high it drew 75 amps. The Nelson harness is fully capable of supporting this(not for a constant high amperage). After the initial start up the amperage levels off to around 7-8 amps both on high.
I have the Nelson harness with the 05 Fans. I know this may sound odd but you may have too much amperage in your system for the relays. I have the stock 105a alt and can only make a small amount of amperage, where as you have a high capacity to put out amperage, hence you can put the full power to the fans to turn them on where i cant possibly over amp the relays, you can. this may be the problem. Not sure tho.
Does this make sense?
I have the Nelson harness with the 05 Fans. I know this may sound odd but you may have too much amperage in your system for the relays. I have the stock 105a alt and can only make a small amount of amperage, where as you have a high capacity to put out amperage, hence you can put the full power to the fans to turn them on where i cant possibly over amp the relays, you can. this may be the problem. Not sure tho.
Does this make sense?
#39
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I have the LS1 fans with the Nelson Wiring Harness and I have my Fans come on at 180 because I have a supercharger and the truck still runs at 14 AMPS with Factory Batttery and Alt. My truck still creeps up too 190 when it is 100 outside which means my fans run constantly and it still stays at 14 AMPS.
#40
Originally Posted by 04GIBBS
I have the LS1 fans with the Nelson Wiring Harness and I have my Fans come on at 180 because I have a supercharger and the truck still runs at 14 AMPS with Factory Batttery and Alt. My truck still creeps up too 190 when it is 100 outside which means my fans run constantly and it still stays at 14 AMPS.