well it all started 2 days ago my battery completly died after a recharge ok... Everything work fine then I noticed neither fan turned on wtf... I was lost checked all the conections everything was connected then I swithed d relays or fuses around,fans turned on @ idle and when I turned on d AC it worked until today truck started to overheat now neither fan works what could be d problem...bad relay? Any advice? I have 05 efans nelson harness on a wheatly tune

 

go to parts store and buy you some more relays

 

My Nelson harness hung on to the original relays for a few years, then smoked two of them a day apart shortly after getting the truck back on the road after being down 18 months with a blown trans.

 

Mine would work sometimes and then sometimes wouldn't.. I got tired of messing with them and threw the clutch fan back on.. I changed relays and everything all the time and most of the time they would work with the a/c on but then nothing and it kept bugging me so I took em off.

 

ok well I went to autozone and bought 2 relays switced one and it worked in idle n with the AC on...just one question when the AC is on only one fans turns on high the other off, I never noticed it until now is that the way it works or should both b on high??

 

One will be on high with if the engine hasn't reached the fan turn on temp and the ac is on, if turn on temp has been achieved and the ac is on, both will come on high...

 

DanG... only one turns on while the AC is on does that mean another relay is gone or i havent reached the turn on temp i let the truck on with the AC on BLAST...and nothin but the truck is not over heating i jst want to fix it... thanks for all the help. i think im go to autozone and buy 2 more relays..

 

keep three relays in the truck at all times. Mine go out on occasion, I swap them, and it works. Your battery probably died the first time because a relay stuck open. That happened to me, had to tap relay with a screwdriver to shut it off. Awesome style points...shut off truck, pop hood, smack something, fan stops. :ghetto:

 

i get the 40/30 amp hella relays and have had no issues....i made my own harness using GM diagram...2 pin 3 relay setup controlling permacool coolpack2 fans.

 

Sounds like you haven't reached turn on temp yet...let the truck run until both fans come on low, then turn on the ac, and both should switch to high. Only one fan on high with the ac on is normal if you haven't reached the turn on temp