AAW Harness and LS1 Fuse Block Question

[Tictakman]

Afternoon,

Im having an issue regarding my AAW harness and a fuse block that my engine wiring harness guy made for me and I cant figure out how to get them to work together...

My 69 camaro came with a American Auto Wire harness and has an ignition fuse which i used to power the LS1 fuse block (12 volts when cranking)... the ls1 fuse block is controlling my fans, ecu, and fuel pump. I am pulling more amps than the 30 amp fuse so it keeps blowing once I manually kick on the fans. How do I work out this issue? I was going to put a larger amp fuse in but i dont think thats the correct way to do it...


I was going trying to bypass the AAW ignition fuse and go right to the ls1 fuse block but then everything else in the car didnt work. Should I take the ignition wire and put it to a high amp relay then go to the ls1 fuse block? Wouldnt that just pop the AAW ignition 30 amp fuse?


Thanks for the help,

Zak

[Z06vet]

Both the fans & fuel pump should be on their own relays. Just making sure thats how it is wired. My harness builder does not include a fuse block. I use AAW harnesses on my builds. I run the computer hot leads (orange & pink in my case) to the AAW access plug (also orange & pink). They are large gauge wires and have provision for power windows, locks, etc. You can run anythng you want to them. There is a dark blue wire designated for fuel pump, which I use to feed the pump relay. These are all fused so you should not have to use the provided fuse block. It sounds as if you are trying to run everything from one power source to the ecm harness fuse block. Have any pics? I'm just kind of wonging it here lol
Scott

[wayward]

No way 30A will carry all that.. I assume the fuse block is intended to be an under the hood distribution point?

need to look at your:
1. Fan specs - most likely need 15-20A
2. fuel pump Specs - most likely need 15-20A
3. ECU - (i'm running a Holley unit so i'm not sure here) 10A +

your fuel pump, ECU and fan will be running together often.

a couple questions -
1. What is triggering your fan? -does a signal come from the ECU..
2. What size wire is feeding your under the hood fuse block -
3. do you have any drawings for the fuse block?
4. which 30A circuit are you using from your AAW circuit (is it a simple output)

[Tictakman]

Yeah im trying to paint a nice picture but i guess im not doing a good job... haha My harness builder incorporated his own fuse block to control a few things

The ls1 ecu is controlling the fan on.
The ls1 wiring harness has its own provisions for the fused ecu, fans, fuel pump and also have their own relays (fans and pump).
The AAW has its own fuse block which have the ign (pink)wire that supplies the + voltage during cranking, i have this going to the ls1 wire harness fuse block (needed for the ecu).

When I turn the car on and the fans kick on it pops that 30 amp fuse bc its too high of a current draw coming out of the AAW fuse block.

I was wondering if I should run that ign fuse from the AAW fuse block to a high amp relay then to the ls1 harness fuse block...or would that still pop the 30 amp ign fuse on the AAW block?


I tried to cut the ign wire going into the AAW fuse block and wire that directly to the ls1 harness fuse block but that was when nothing worked...

[Tictakman]

Oh, the wiring instructions say, "you may want to use a main high current relay if your ignition switch is not capable of providing the current required which is approximately 40-50 amps or more..."

Thats where or why i was asking how to incorporate that with basically two fuse blocks.


Zak

[wayward]

I'll try to say this without to many words and confusing the issue.. :-)

You need "master bus" amperage potential that will cover the load for the fuse block.

This high current relay would feed the main input for the under the hood fuse block. The 12 v ignition wire would then trigger the relay providing power directly from the battery to the fuse block assuming everything is fused..

Oh, the wiring instructions say, "you may want to use a main high current relay if your ignition switch is not capable of providing the current required which is approximately 40-50 amps or more..."

Thats where or why i was asking how to incorporate that with basically two fuse blocks.


Zak

[Z06vet]

Your fans should not be pulling power from that circuit. They should be wired directly to the battery & neg side to chassis ground. Ignition should only be wired to the fan relays, the ecu suppling the ground(s) to trigger the relays. In other words the fan relays should be taking the load, not the ignition circuit.

[Tictakman]

yeah thats how i do have the fans wired up. i have the power wires coming from each of the fan relays going to the fan, then grounded. ecu is sending the negative signal to kick them on from there..

[Tictakman]

I think thats what Im needing...I ended up ordering a tyco fuse that is 100 amp. Ill let ya know if it works hopefully this weekend!

[chpr1972]

I'm kinda confused on how you have your fan wired. Here is how my fans are wired. Here is how I wired mine. First I have a battery with a top and side post. I used the top terminal for the starter/ignition inside car. I then used the side terminal for my fans and amps. I have a fused terminal from my junction block to my amps but not to my fan relays. I bought the relays with wire pig tail from Dakota Digital $15 each[dual fans require 2 relays each wired separate]. I run a battery cable to a junction block I bought at a stereo shop for $20. From the junction block it is wired to the relay and from the relay to the hot wire on the fan. The ground wire from the fan I wired it to the 2nd junction block that goes to the negative side of the battery. The fans NEED a good ground. The ignition on wire [orange on aaw] I ran to the ignition side of the relay.[this turns the fans off when you shut off the key]. You really need a fan controller so the fans do not run all the time so the last wire on the relay goes to the fan controller. I used Dakota Digital controller cause I have Dakota Digital dash also. Since I have dual fans it requires a second relay that has it's own wire from the battery and the orange wire is the only wire that I wired to both relays.

[Tictakman]

I wanted to follow up w the thread. I did order and install the high amp relay that I referred to earlier and it works perfectly. I have the pink wire going to the relay and then from the relay i have it going to my fuse block which powers my fans, ecu, etc. With everything running its powering everything without popping a fuse.


Zak