Parking/Taillights and dashboard Out HELP!
#1
Parking/Taillights and dashboard Out HELP!
3.0l 2WD Sport. Taillights and Parking lights out. Dashboard and dimming is down too. Replaced fuse (31 in passenger fuse box). Nothing. Checked voltage and no power reading at all to fuses 26 thru 31 in passenger fuse box. Replaced all three fuses in main fuse box feeding passenger box (F1, F3, F5). Nothing. Replaced headlight switch. NOTHING!
A bad wire maybe??? Help, dudes!
A bad wire maybe??? Help, dudes!
#2
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#3
#4
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Yes, it has one, in the SJB
The head light switch is a GROUND switch not 12volt
When you turn Parking lights on the Main switch grounds the Parking light relay,
it closes and sends 12v from fuse 31 to Fuses 1(dash lights) and 2(SJB) and sends 12v to front parking lights(brown wire) and rear parking lights(black/pink stripe wire)
But you say fuse 31 in SJB has no 12v, and it should have full time 12v, its not a key on key off circuit
Until fuse 31 has 12v there would be no parking lights or dash lights, its first in line in the circuit
Fuse 31 gets full time 12v from Fuse 1 in engine fuse box, 40 amp
This 12v is a dark green wire that comes to the SJB on connector C2280A
I would unplug this connector and check for corrosion, then plug it back in
Battery+ -------------fuse 1(engine bay)------------------------------[fuse 31---parking relay](SJB)----------------------parking lights
The head light switch is a GROUND switch not 12volt
When you turn Parking lights on the Main switch grounds the Parking light relay,
it closes and sends 12v from fuse 31 to Fuses 1(dash lights) and 2(SJB) and sends 12v to front parking lights(brown wire) and rear parking lights(black/pink stripe wire)
But you say fuse 31 in SJB has no 12v, and it should have full time 12v, its not a key on key off circuit
Until fuse 31 has 12v there would be no parking lights or dash lights, its first in line in the circuit
Fuse 31 gets full time 12v from Fuse 1 in engine fuse box, 40 amp
This 12v is a dark green wire that comes to the SJB on connector C2280A
I would unplug this connector and check for corrosion, then plug it back in
Battery+ -------------fuse 1(engine bay)------------------------------[fuse 31---parking relay](SJB)----------------------parking lights
#5
#6
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#9
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Just a heads up
As voltage goes down AMPs required goes up
So corrosion on a connector lowers the voltage but the device being powered still needs the same Watts so amps increase causing wires to heat up
Say you have a 100watt load at 12v thats 100/12 = 8.3amps
at 9v its 100/9 = 11.1amps
I mention it because you said Green wire looks like it was getting hot, its connected to a 40amp fuse so could get VERY hot, lol
Green wire also powers several other devices/fuses
As voltage goes down AMPs required goes up
So corrosion on a connector lowers the voltage but the device being powered still needs the same Watts so amps increase causing wires to heat up
Say you have a 100watt load at 12v thats 100/12 = 8.3amps
at 9v its 100/9 = 11.1amps
I mention it because you said Green wire looks like it was getting hot, its connected to a 40amp fuse so could get VERY hot, lol
Green wire also powers several other devices/fuses
#10
#11
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No, I don't think the one with the ? is the one you are after
Heres is the wiring diagram for SJB
Dark Green is on pin 1
You could pull out Fuse 1 in engine fuse box to confirm
Also fuses 3 and 5 to confirm those wires, that should give you the pin numbering Ford used
Diagrams are great but are not always accurate, especially for wire colors
But the dark green, dark blue and red wires are larger gauge, full time 12v with 40/50amp fuses, so seem to match diagram for C2280A
Heres is the wiring diagram for SJB
Dark Green is on pin 1
You could pull out Fuse 1 in engine fuse box to confirm
Also fuses 3 and 5 to confirm those wires, that should give you the pin numbering Ford used
Diagrams are great but are not always accurate, especially for wire colors
But the dark green, dark blue and red wires are larger gauge, full time 12v with 40/50amp fuses, so seem to match diagram for C2280A
Last edited by RonD; 08-04-2019 at 12:46 PM.
#12
#13
Oie. Ok. So, call me a newb, but maybe I should have checked this earlier: 31 DOES get power IF the headlights are turned on. I can hear what I assume is a relay clicking on and off when I put fuse 31 in and out of its slot. But no parking lights or dash still. ???????
Bad relay? Can I replace that?
Bad relay? Can I replace that?
#14
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On the 2006 Power 1 of 2 diagram I posted that dark green wire feeds 6 fuses including 31 test if any of the others have 12v
You will probably need to pull off the SJB to get to the back side
Read here: 2005 Range Edge Smart Junction Box SJB - Ford Ranger Forum
Unhook battery when you do this
You will probably need to pull off the SJB to get to the back side
Read here: 2005 Range Edge Smart Junction Box SJB - Ford Ranger Forum
Unhook battery when you do this
#16
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