Upfitter Kill Switch
Mountain Pass
Joined: Aug 2019
Posts: 135
Likes: 20
From: Lampe, MO
Can you elaborate on why you'd wire it this way? The upfitter switch is providing 12V via the lead wire, so why would that not go to pin 30?
I'm going to be tapping into one wire only. Fuel pump power supply. A second wire should be a return line back to fuel pump control module, and a 3rd for pump ground.
I'll interrupt the power supply TO the pump with a relay. So 12v will travel from the FP control via power wire that just happens to have a relay loop installed in the middle of it. So wouldn't the FP power wire be switched at 86 & 87?
I'm going to be tapping into one wire only. Fuel pump power supply. A second wire should be a return line back to fuel pump control module, and a 3rd for pump ground.
I'll interrupt the power supply TO the pump with a relay. So 12v will travel from the FP control via power wire that just happens to have a relay loop installed in the middle of it. So wouldn't the FP power wire be switched at 86 & 87?
86 and 85 are what turns the relay on or off, 85 should be ground and 86 would be power from your upfitter switch. 30 is the common contact for 87 and 87a, if you take the power wire for your fuel pump and cut it and connect one side of the wire to 30 and the other side of the wire to 87 that circuit will be broken until the upfitter switch is activated to switch the relay.
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