Nelson Performance E-Fan Harness
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You ever get a chance have him live tune it too!! No b.s. I dropped .7s over another local shops tune from his.. I got the shaft on my originsl silverado tune and he brought it over the top and saved me!!
Sign up on ls1truck.com as well only couple tbss on there but very welcome!
three relays = dual speed (lo/hi). i just made my own harness this way. the instructions i was looking at on their site were for another pcm, make sure you have the correct pin location. you'll have to add a pin for the hi speed setting. and of course you will have to have your ecm tune modified accordingly
I plan on going to the shootout in valdosta this year.
i think he's talking about the ls1 truck shootout in texas.i will be at shootout at sgmp this year also:coolthumb:
I was just going to start a thread about how to get hi/lo on our LS1 fans.
I have built my own harness before for my 2000 sierra, but i thought TBSS's were different because Alvin's harness only had 2 relay's.
I need a schematic! anybody have one.
I have plenty of relays and wire sitting around.
I have built my own harness before for my 2000 sierra, but i thought TBSS's were different because Alvin's harness only had 2 relay's.
I need a schematic! anybody have one.
I have plenty of relays and wire sitting around.
If you guys are interested in Hi-Lo fans let us know. That is what the third hole is for on the spal fan kits. The reason why we do not do them is because there are quite a few guys who have a hard time installing the PCM pins. We felt the simpler we could keep it the more successful people would be installing them.
We could do it as a trade out service or from scratch. My own TBSS has high/low fans.
We could do it as a trade out service or from scratch. My own TBSS has high/low fans.
for ls1 fans you can get away with a single speed harness. but for spal fans, dual speed is a must, because as soon as the AC kicks on, the fans go on full speed and it sounds like a helicopter turbine spinning up. now mine go on low speed to serve the ac condenser most of the time, and when the ect gets up there then it goes into hi speed.
Thats literally how we've tried to be from the begining. I can offer two speed harnesses. Like I said before, that is what that last hole is in the spal fan kit. Here is a picture of my truck with a Hi/Lo setup
See the third relay there on the left?
I installed a 3-relay efan harness from Nelson but want to be clear on the pin locations and tune. Its on a 2007 TBSS with LS1 fans and a 160* thermostat.
Is the low speed to go on J3 pin# 49 and the high speed wire to go on J1 pin# 54? There was nothing in J1/54 but there was a white with black stripe wire on J3/49 already.
The fans come on at high speed if I turn on the A/C but they wont come on at all at regular operating temps (170-180*) Its cold outside so it hasn't gone over 185*.
Is the low speed to go on J3 pin# 49 and the high speed wire to go on J1 pin# 54? There was nothing in J1/54 but there was a white with black stripe wire on J3/49 already.
The fans come on at high speed if I turn on the A/C but they wont come on at all at regular operating temps (170-180*) Its cold outside so it hasn't gone over 185*.
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