Question another gpr question

[klinkzor]

ok when fighting a electrical issue with a going bad alternator. well i got that issue fixed and moved onto the gpr issue im having.

i thought the gpr had been moved from the stock location to outside of the valve cover and mounted to the vacuum pump bracket. now after further investigation the one gpr is still in the stock location but it appears that the gpr on the outside of the vac pump is wired to the stock location one.

i can jump the lugs on the outside gpr which does make the glow plugs work but my main question is how many relays should there be on the motor? i'm slowly trying to get the accessories back to stock but the way they did this stuff just blows my mind.

thats the mess i'm dealing with

 

[BJS]

one of the GPR looking gizmos is actually the GPR (go figure) the other one is the relay for the IAH (Intake Air Heater).

We'll have to let one of the SD guys answer which one was which originally and see if there is a means by which the wiring can identify them. It is likely that the hot wires are common between the two but the trigger and output lugs should be the same.

 

[JLDickmon]

two
one for the glow plugs
one for the air intake heater..