x2 , fuses, fuses are first. always with electrics. right? sure.
2nd step is scan the PCM, oops you didnt.
2006 Isuzu Ascender
here ill RTM , for you,,, online at mitchells.
usa cars, only. so......
ok ready?
there are 5 head lamp fuses
and 2 HL relays.
fact.
3 fuse just for Low beams
seen here.
if both fuse below are 0v, both end,s
that means Relay 46 is bad or not energized by the BCM
and if the coil is hot, (left side 46) then the relay is bad
if the coil is not hot, the BCM is malf'ing(lots of ways,ask)
we scan it. if the BCM is not closing relay 46.
easy huH?
get B0951? dtc?
B2575?
do you have DRL lighting (canada does, i cant guess)
we dont.
fuse and 46
this is the input to BCM, if Headlamp glows below. ?
then the PCM say you turn them on, if not , bad deal, ask.
and last is pin 5 hot? hot means 12vd
if not the bcm is bad, if above works. easy no?