Renix Not starting. Fuel pump not priming. only 7v at pump.
- Thread starter tayman
- Start date
tayman
NAXJA Forum User
- Location
- Niceville, FL
I would appreciate that greatly. Thank you.
tayman
NAXJA Forum User
- Location
- Niceville, FL
okay, so after further digging, I've discovered that I have power to the FPR, but no power after the starter relay.
but neither jumping the relay pins, or pin 87 to the ballast resistor wires, or straight from the battery to the resistor wires will make the damn thing run. I'm freakin' stumped.
but neither jumping the relay pins, or pin 87 to the ballast resistor wires, or straight from the battery to the resistor wires will make the damn thing run. I'm freakin' stumped.
tayman
NAXJA Forum User
- Location
- Niceville, FL
For sure, I understand. I appreciate all your help thus far.
I'm just confused as to why I have no power after the starter relay, but jumping straight to the pump doesn't work either.
I'm just confused as to why I have no power after the starter relay, but jumping straight to the pump doesn't work either.
tayman
NAXJA Forum User
- Location
- Niceville, FL
hahaha! the hood is one of the few straight things on mine! and thank you. EVERY idea helps.
Not to mention I may be moving in a few weeks, so I really need to get my junk running
Not to mention I may be moving in a few weeks, so I really need to get my junk running
tayman
NAXJA Forum User
- Location
- Niceville, FL
hah I did break my sun roof. replaced it with more sheetmetal.
Ok.
so thoughts I had about this.
It should be the green fusible link that goes to a red wire that powers all the relevant relays. There's more than one
Thanks AMC. You'll hae to follow it back into the harness a bit to check it.
I had problems with my fuel pump wirin under the coolant football. Thta's where you'll find a duct taped crimped together wire splice. might want to check that. Since it's not priming I'd really suspect something in the ballast resistor bypass, but I've not got one of those or a FSM that references it, so I can't help you much with that.
Have you tried jumping 12V to the diagnostic pin for the fuel pump to see if it runs? If it does, then you've got a problem in the front half of the harness. Or something wiered with yor relay situation.
Have you checked the ignition switch wiring? There's two wires that bring power into the cab and to the ignition switch. They're in the top of the fuseblock. Pretty sure it's a red one and an orange one. My junk would randamly stop running and it was those two wires at the bulkhead concector behind the fuseblock. 10mm (?) socket to the bolt in the middle of it will get it off. Clean all the brown nasty salant out of it with a plastic safe solvent. I used non clorinated brake cleaner.
so thoughts I had about this.
It should be the green fusible link that goes to a red wire that powers all the relevant relays. There's more than one
Thanks AMC. You'll hae to follow it back into the harness a bit to check it.I had problems with my fuel pump wirin under the coolant football. Thta's where you'll find a duct taped crimped together wire splice. might want to check that. Since it's not priming I'd really suspect something in the ballast resistor bypass, but I've not got one of those or a FSM that references it, so I can't help you much with that.
Have you tried jumping 12V to the diagnostic pin for the fuel pump to see if it runs? If it does, then you've got a problem in the front half of the harness. Or something wiered with yor relay situation.
Have you checked the ignition switch wiring? There's two wires that bring power into the cab and to the ignition switch. They're in the top of the fuseblock. Pretty sure it's a red one and an orange one. My junk would randamly stop running and it was those two wires at the bulkhead concector behind the fuseblock. 10mm (?) socket to the bolt in the middle of it will get it off. Clean all the brown nasty salant out of it with a plastic safe solvent. I used non clorinated brake cleaner.
tayman
NAXJA Forum User
- Location
- Niceville, FL
I've addressed the nasty cluster of crimped wires before. I somehow managed to solder them together. But I'll check again.
Do you know which diagnostic pin is the one for the fuel pump?
I'll check on those ignition wires as well
I really wish I had a fsm...
Do you know which diagnostic pin is the one for the fuel pump?
I'll check on those ignition wires as well
I really wish I had a fsm...
tayman
NAXJA Forum User
- Location
- Niceville, FL
oh... and which red wire? where does it originate/plug in?
tayman
NAXJA Forum User
- Location
- Niceville, FL
More news.
The 4 red wilre splice is good.
ran a jumper wire from the battery to the pump again. Nothing. even kept the connector plugged in and stuch a drill bit down into the connector to keep the grounds connected. Nothing.
Checked voltage at the wires going to the pump at the connector. 7.6. I think I mis-stated earlier on and said there was basically none. that's not correct, it's 7.6v
the ballast bypass is good it's literaly two wires wire-nutted together. not much to go wrong. and I've checked it a bunch of times anyway
The 4 red wilre splice is good.
ran a jumper wire from the battery to the pump again. Nothing. even kept the connector plugged in and stuch a drill bit down into the connector to keep the grounds connected. Nothing.
Checked voltage at the wires going to the pump at the connector. 7.6. I think I mis-stated earlier on and said there was basically none. that's not correct, it's 7.6v
the ballast bypass is good it's literaly two wires wire-nutted together. not much to go wrong. and I've checked it a bunch of times anyway
tayman
NAXJA Forum User
- Location
- Niceville, FL
didn't check the ign wires yet. got frustrated and came back in. (Inm working in a parking lot, not a garage. fire ants galore, rocky asphalt, and I've had a really bad few days.
cruiser54
NAXJA Forum User
- Location
- Prescott, Az
#6 cavity, orange wire in the small diagnostic connector is for fuel pump relay.
tayman
NAXJA Forum User
- Location
- Niceville, FL
Thanks. And jumping that will tell me whether it's engine bay or further back?
cruiser54
NAXJA Forum User
- Location
- Prescott, Az
I have no idea at this point. I just provided the info for ya.
tayman
NAXJA Forum User
- Location
- Niceville, FL
Fair enough. Thank you.
Tacedaddy
NAXJA Forum User
- Location
- Shenandoah valley
I didn't read ur whole thread sorry but I had identical symptoms with mine two weeks ago an it was the relay... I swapped other working relays in it didn't fix it so I went about checking everything from the ignition switch to the wiring harness itsself. Got fed up and ran a wire straight from the battery to the pump with a switch for a week . 1 day my buddy stops by and happened to have a brand new relay. I swapped it in an the jeep ran... Go figure
tayman
NAXJA Forum User
- Location
- Niceville, FL
huh... weird. Guess it can't hurt to replace it anyway then, right?
what's killing me is: even with a wire straight from the battery, the pump won't run. it's the middle pin on the connector, right?
what's killing me is: even with a wire straight from the battery, the pump won't run. it's the middle pin on the connector, right?
