Is that GPR relay for the 7.3 IDI or 7.3 powerstroke? Is it an Amazon purchase or available through auto parts store? I would love for my Ambo to start right up......
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Stock Ford Econoline 5x7 headlights are marginal at best. Crestline Ambulances use driving lights to suplement the basic headlights. These are wired to come on with the high beams. Mine had been removed and driving on dark windy highways was downright scary at times.
A set of rectangular Hella 550 driving lights make all the difference. I just came home on a dark and rainy night... Without them was like having no headlights... Turn them on and visibility was excellent, I highly recommend them. In Canada they cost about $150, and it was money well spent.
2) It's a Road Rescue model. I'm looking to delete the rear aircon/heater unit. I don't need it while driving and it's no use to me while setup in basecamp as I don't want to run truck and stink up the joint with diesel fumes. Can I simply cap the ends of the ac lines or do they need to be connected to complete a cycle? Is there anything specific I should look out for?
Odds are the yellow plug is where the block heater for the 7.3 is supposed to plug in. Look at the wall behind the drivers seat, down by the floor. Is there something there that looks kind of like a household light switch? If so, thats for turning the block heater on and off. If you look at the beginning of the Belafonte Reboot thread there are pictures of eveything I mentioned. Might help you out. Looks like we have the same base unit.
I deleted mine and just capped the A/C line. Then put a NAPA coolant filter setup on the heater line. Everything works super duper. Was really easy to boot. Just make sure you get the right cap with correct thread pitch for the A/C cap or it will leak.
You are correct!
I have a 1993 Wheeled Coach ambulance, and it had a set of A/C valves on the left (driver's) side, underneath outside of the frame, at the junction of the cab and the patient compartment (module). These valves can be used to isolate the rear unit for repair/replacement etc.
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Are you sure you don't have something like this hiding somewhere?