AirDog 100 & FP gauge

[Soupy]

Hi guys: Just finished installing the Air Dog. Straight forward install, no problems. Truck started right up after system was primed. In the Air Dog wiring harness there is a GM type weather pack connector down by the pump to connect to AirDog's low fuel pressure Hobbs switch. I bought a Westach 30 psi gauge instead. In the engine bay there is two female spade connectors to connect to the LED light. I want to use this existing wiring harness to run my FP guage. Only thing is that the Westach has a three wire hook up. How can I make use of the AirDog harness to power my gauge? I also installed the Westach FP sender on the pump, no problem there. It would be nice to not have to run new power as the AirDog is allready relayed power and fused. This would save me a bunch of time. Any suggestions? Thanks



Brian

 

[XtremeDiesel]

what are the 3 wires, power ground and dimmer?

 

[Soupy]

The Westach gauge has three small pins on the back of it. The wiring harness that goes with this gauge slides onto the pins and then connects to the sender. The Westach sender has two terminals. In their instructions, Westach says to connect pin #2 to either sender terminal(power) Connect pin #5 to the other sender terminal(ground). Now connect pin #4 to 12V positive. The AirDog harness has only the weather pack at one end and two female spade connectors at the other. Is there a way to incorporate the Airdog harness to the Westach gauge and have it work off the relay and fuse that is now installed for the AirDog? Would there be anything different in a low pressure Hobbs switch and a fuel pressure sending unit as far as getting power etc? I just wanted to save myself some time instead of running new wires under the truck, installing a relay etc when everything is already there. I hope this is not too confusing. Thanks.



Brian