Yup, new pump is already installed, old one checked out as good so it goes on the shelf sealed in a plastic bag.

Got the new pass side mirror installed and did some cleaning inside. Next probably will be a radio, p.o. added a big amplifier under the pass seat and kept the radio. left a pair of Boston speakers mounted on the doors so I'm sure I will have to search for the other end of the wires.

I was going to reset the CEL but where did they hide the OBDII port?? I'm sure it is because the gas cap was missing..

 

under the driver knee panel, feel around under there youll feel it.

 

Thanks, gotta look a bit more under there.

well tonight it lost power to the pump again. I suspect it blew the fuse. I noticed the connector at the Inertia switch looked a bit burnt on the fuel pump side. Gonna start there. We were also playing with the radio wiring and it looks like the wiring harness was cut off by there so that also will get a closer look.

 

If OBDII your's is like mine look for a hole, mine was messed up and tucked away somewhere lol

 

I have a similiar issue with a LRD I was given.
I pulled the tank and cleaned it out because it sat for 5 years not running.
I bench tested the pump and works good but nothing when the key is in #2 position and connected. Not even for a moment.
Any thoughts?

 

Look at post from ihscouts (post #18) it pretty much sums up the whole circuit. Check fuse under hood and fuse below steering wheel side of the dash (satellite box 2 fuse #3) I believe I am still having problems with the multi relay under the hood.

 

Take the cover off the MFU, you'll see either burned traces, components or the usual issue - burned/pitted contacts if the circuit was/is overdrawing current. There are two coils with contacts. The right set isn't used, they're your spare incase you don't buy another, quick field repair or don't wish find a used. Unsolder the unused coil, solder in place of junk coil, easy. Black plastic wedge shaped box about the size of a pack of smokes behind the battery, near the charcoal can.

 

You'll need to use a multi-meter to test the circuits with. Helps pinpoint electrical problems. Borrow one if you cannot afford one.

You need a copy of the Rave (service manual). They have an Electrical Troubleshooting Manual included which makes it easier to understand your trucks layout and repairs. It's free.

 

I used some Electric Contact Cleaner on the connectors and the bottom of the MFU. Big mistake. afterwards everything is going crazy. I hear a fast clicking inside the truck from the left side, radiator fan is on, no fuel pump pressure, etc. engine turns over but that's it. I pulled the MFU and opened it up, found some cleaner still inside possibly shorting out things (?) cleaned it out and also some corrosion at the back side of the 6 pin connector. Gonna try it again in the morning.

 

I also plugged in my cheap-o scanner to the OBD port (after I put in the missing fuse)
I got 9 codes...
132
1179
1178
1176
1317
300
307
1316

I think they were all caused by the fuel pump not working and the P.O. poured gas in the intake so he could see if it ran. I copied them down and cleared it. we'll see if they return.