No voltage to o2 sensor fuse '99 durango
no symptoms told is engine dead, or is DTC for O2 set.?
no clues told to put helpers on target.
are you asking which fuse blew or why it did.?
a fuse has 2 end both ends are 12vdc key on
if one end is now 12v but near 0v the fuse is BLOWN
no better test exits. doing that with a DMM. (a live test)
well the fuse is blown and 02 love to short the 2 heater pins
or wires at it burned and shorting, loves to....
no engine told so exact answers are not possible
the service manuals are by country ,year, make,model, engine and transmission, if driveline problems and is.
gen 1 is DODGE:
3.9 L (238 cu in) Magnum V6
4.7 L (287 cu in) Power Tech V8
5.2 L (318 cu in) Magnum V8
5.9 L (360 cu in) Magnum V8V6
USA drawings, show.
OXY fuse is
Fuse A1 , 10 amps. a1 is hot if ASD is not dead keyon.
same fuse A2 if A1 is hot, and A2 is dead, the fuse A1/2 is blown
all 4 OXY sensors run off that one FUSE
now lets talk why pin A1 WOULD BE DEAD
WELL THE ASD IS DEAD. IS WAY .
ASD GOES DEAD FOR ONE PRIME REASON, SPARK IS DEAD.
THIS MAGIC LOGIC IN THE PCM PREVENTS CRASH AND BURN.
3 CAUSES ARE.
1: PCM SEES ANY COIL SPARK FAIL (DETECTED)
2: PCM SEES CMP DEAD.
3:PCM SEES CKP DEAD.
OR PCM FUSES BLOW, TO IT. SURE
. PCM RUNS ASD ALL BY ITSELF AND ITS RULES.
Why not start problem by telling it first.
engine dead, cranks ok.?
or runs for 1 to2 second and ASD drops and sure stalls.
10/3/2022 7:57:40 PM •
1999 Dodge...
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