'95 PSD...can anyone tell me what the fuse in slot #4 under the hood goes to?. It keeps blowing but I can't tell that anything is affected. My ABS light stays on but they don't seem to be on the same circuit. Any help would be much appreciated!

 

i dont know if they are the same, but on my '01 its for the "trailer tow backup lamps,trailer tow park lamps" 20amp

 

Fuse 4 - protects the following circuits:


Exterior Lamps
Trailer Marker Lamps Relay
Warning Chime
Instrument Illumination
Keyless Entry
Anti-Theft
Trailer Brake Control Unit

 

Wow, that's weird. All of those things are working and there is no fuse in the slot! Guess I'll continue tracking it down the hard way....
Thanks guys

 

The #4 fuse in the fusebox under the dash is for those items listed earlier. The power distribution box under the hood is labeled with letters so starting at the bottom left (A) for Diesel applications the fuses are labeled:

Starting at the bottom (as you look at the box from the left fender) left column (closest to the grill) and going "up" (toward the engine):

A (20 amp radio)
B (15 amp Ambulance Diesel 200 amp alternator voltage regulator only)
C (30 amp Horn relay, daytime running lights, high beam flash to pass)
D (25 amp Trailer marker light relay, trailer backup light relay)
E (15 amp Backup lights, daytime running lights, trailer battery charge relay)
F (10 amp Trailer right stop/turn lamp)
G (10 amp Trailer left stop/turn lamp)

Maxi Fuse Locations
H (30 amp Injector driver module IDM)
I (20 amp PCM, PCM power relay, trans control, IPR, IDM relay)
J (20 amp - see fuses 15 and 18 starter relay)
K (Not used)

The L position starts at the "bottom" in the center column and going "up":

L (50 amp - see fuses 5,9 and 13)
M (Not used)
N (50 amp - see fuses 1, 7 and fuse E)
O (Not used)
P (50 amp Generator charge indicator, instrument cluster, see fuses 2,3,6,11 and 17 and maxifuse U, also see Circuit Breaker 14)
Q (30 amp Trailer battery charge relay)
R (40 amp Main headlight switch, headlamps)
S (50 amp - see fuses 4,8 and 16, also circuit breaker 12)
T (30 amp Trailer electronic brake controller)
u (30 amp Fuel line heater, 200 amp alternator/voltage regulator, PCM power relay coil, glow plug controller)

The relays, starting from the "bottom" again and going "up", as follows:

PCM power relay
IDM relay
Horn relay
Trailer marker lamps relay
Top relay (closest to engine) not used.

Hope this helps out.

Dave / Believer45

 

Dave, Thank you so much for the great info. I have printed it out and will not have to bother folks with such trivial questions in the future. You da man...
Fred

 

Not a bother at all, Fred. It us why most of us are here - to get information and to give it out when we can. Just paying back some of what I have gotten from this site.

Dave / Believer45