Some of you may or may not have this situation - when my truck is off, after an unspecified amount of time the S/C coolant pumps come on. I am under the assumption from reading other posts that this is due to the S/C pump wiring being connected to the Fuel Pump circuit; and since the ECM will activate the Fuel Pump when the truck is off at times for testing that this causes the S/C coolant pumps to activate as well during the self tests.
It's not a big deal and I only notice occasionally when in the garage that my truck is "alive" by the whirring sound of the S/C pumps coming on randomly.
So I happened to be looking at the main fuse block in the engine compartment and I am assuming (bad) but need clarification that the yellow wire in my photos is that of the S/C pumps/etc being connected to the EFI 10A fuse.
What I am thinking is if the empty fuse slot above the EFI fuse is an option that if I put a 10A fuse there and change the yellow wire to run off of that if it will put an end to my S/C coolant pumps randomly coming alive when the fuel system self tests.
I plan on testing this out, but if there is someone that knows I absolutely should not, speak up. I am planning to add a 10A fuse the to black slot where the green arrow is.
My concern is also that, in changing this yellow wire to the empty 10A circut that the pumps will not function properly while the truck is running resulting in an overheat situation with the S/C.
Yay or Nay?