well..after much warning..and giving it a chance..my VSC failed after 2 weeks worthg of driivng and about 800miles...what a POS those things are!

Needless...Nelson harnass is on the way.....any tips on the install???

NEEDED TO VENT!

 

What's VSC?

 

vsc=pos

 

the reason the vsc failed is simple. when you put two high amp drawing fans on a controller the is only meant to control one 30 amp fan youll have issues. i learned thsi the hard way. the last vsc i used i ended up using relays to help take the surge of the 2 30amp ls1 fans. the vsc has worked fine with no issues with the setup like that. also ive ran a vsc on my single LT1 fan for almost 2 yrs now and no issues.
so if you go vsc again think of using maybe two or two relays to help it along. two 5 dollar relays will get you by

if you go nelson just remember that his harness has no "switched on" source which means if your ground signal wires ever go to ground then your fans will run till the battery is dead. wxdrvr found this out when tracing his issue a few weeks ago.

 

vsc is varible speed controller

 

Call up Flex-A-Lite and tell them you want part number 33057.
This VSC has heavy-guage wire soldered in to splice to rather than the lug terminals. It handles greater power. This VSC is superior to anyone's fan harness because of the soft-start and variable RPM features.

The reason the stardard VSC fails is from the heat created by poor connection between the terminals and lugs of the four main power leads. Vibration causes the lugs to spread out and lose conductivity in the connection point which causes resistance and generates enough heat to actually melt the solder on the circuit board within. This happens all the time to many people unfortunately. The only way to prevent it is to zip-tie the wires down tight so they cannot vibrate on the connectors. Once the damage is done though, they cannot be fixed. I am not trying to make excuses for Flex-a-Lite, I know this sucks and the instructions make no mention of how critical it is to secure these main power wires. I can tell you for a fact that vibration is the main cause of VSC failure. The other cause is corrosion from road salt which also causes resistance and heat in those connections. I still have my original VSC purchased in April 2003. It ran from then until last month powering two fans (5200cfm total) when it was removed in perfect working order and replaced with part number 33057 that came with the new 6000cfm fans.

The original VSC electronics are not too small to control two fans, despite popular belief. The flaw is in the terminal connections' ability to maintain a good conductivity and handle the power, not the electronics.

Part number 33057 is visible at the lower left of this photo. The heavy-guage black, red, yellow, and purple wires are soldered on.

 

thats why they offer a 30 amp fuse for it if each fan draws 30 amps and sligthly more on inrush then one 30amp fuse isnt enough. mine didnt fail cause of lose connections or vibrations, they failed cause of overdrawing of ampacity

 

There is no "inrush", the VSC soft-starts the fans. One 30-amp fuse is adequate for both fans. The fuse holders supplied with the original VSC were cheap junk and had conductivity problems as well. The problem IS NOT in the electronics. I know what I am talking about here, you can ignore it if you like.

 

James Berlok? is that you at the bottom of this page?
http://www.flex-a-lite.com/auto/html/vsc.html

if so a rep will always defend his or her product...even if its junk

 

Try to stay on-topic, that is irrelevant. I've shared what I know because it could help. That is all.