bikerjosh
Explorer
I have wired a bunch of new circuits through relays over the years for lights, horns, etc. I just ran a new circuit for an aux fan to cool a supplemental trans cooler and oil cooler at low speeds off road. I have tried numerous things to try and trouble shoot the circuit but still haven't determined the cause or issue.
Here is a rough drawing of the circuit and below is what I have tried, any thoughts or suggestions would be appreciated.
Picture is not great, hear is a brief explanation of path
. So I have a non-illuminated switch, ground wire runs to a known good ground under the dash w/several other accessories-Trigger wire runs through fire wall to a 30 amp relay connected to terminal 86. Terminal 30 on relay runs to a Blue Sea fuse box 15 amp fuse then to the battery. Terminal 85 on relay runs to known good ground in with two other circuits and engine ground strap. Terminal 87 runs to fan (80 watt-12 volt). Fan's other lead runs to a new ground on the frame (sanded clean)
What I've tried so far: attached 12volt source to positive lead at fan-result: fan spins- Assuming this means new ground is good.
Swapped out dash switches and relays to rule out those parts, no change.
Tested relays w/ power applied- both clicked and showed continuity between appropriate terminals.
Tested blue sea fuse box and relay terminal 30 to make sure both were getting power -both showed power
Ran a separate switch next to terminal 86 on relay, and ground it on battery, to rule out a short in the wire run from inside the truck to relay- no change
Replaced the checked(still good) but replaced fuse in blue sea fuse box-no change.
Any ideas? What didn't I check?
thanks
Here is a rough drawing of the circuit and below is what I have tried, any thoughts or suggestions would be appreciated.
Picture is not great, hear is a brief explanation of path
. So I have a non-illuminated switch, ground wire runs to a known good ground under the dash w/several other accessories-Trigger wire runs through fire wall to a 30 amp relay connected to terminal 86. Terminal 30 on relay runs to a Blue Sea fuse box 15 amp fuse then to the battery. Terminal 85 on relay runs to known good ground in with two other circuits and engine ground strap. Terminal 87 runs to fan (80 watt-12 volt). Fan's other lead runs to a new ground on the frame (sanded clean)
What I've tried so far: attached 12volt source to positive lead at fan-result: fan spins- Assuming this means new ground is good.
Swapped out dash switches and relays to rule out those parts, no change.
Tested relays w/ power applied- both clicked and showed continuity between appropriate terminals.
Tested blue sea fuse box and relay terminal 30 to make sure both were getting power -both showed power
Ran a separate switch next to terminal 86 on relay, and ground it on battery, to rule out a short in the wire run from inside the truck to relay- no change
Replaced the checked(still good) but replaced fuse in blue sea fuse box-no change.
Any ideas? What didn't I check?
thanks