does not work,means?
1: lamps in dash told me that
2: front axle dead, on ice?
3: FRONT Prop shaft dead, on ice or stands?
4: front prop ok,(spins but front axles is dead.
we cant guess what not works means.
this part time4wd, and only works on ice or dirt
its not TOD, nor AWD, like on say a Trooper.
its the old PT 4wd, and has strict rules for usage
ill pretend it fails on ice, below....
automatic or stick shift box? main?
this part time system is for iced roads or offroad
have you tested it off road yet? (or on iced over pavement?) Unlike TOD system (torque on demand)
also you can test it all out on jack stands.
lots of steps to that, do need all that. ?
any 4wd shop in town knows all the steps.
called hand testing 4wd. (part time 4wd)
what we do is make sure the the transfer case works
then front axle left to right to center works.
I an also do this just front end off the ground,
is car automatic or stick shift. tests vary that
starting in 1996,the new front axle uses SHIFT on the FLy,part time 4wd, and can be tested on stands. Jack stands. got those>?
the front axle has vsv vacuum actuator(or elect motor)
that locks the front axle.
there are many systems of 4wd, and even Part time.
this one Vacuum, operated, and to test it
other than having vacuum pump like me (portable)
means you must have engine running to test it on stands. hint, lots more dangerous.
first i jackup whole car on stands x4
and put car in say 1st gear, or a/t in low.
then TRANSFER CASE TO 4WD.
AND MAKE SURE THE front prop shaft spins. at a distance , if yes the trans fer case works.
all 4 wheels spin, (no people or pets near car0
and someone in drives seat ,not you, for safety.
hand brake is off. (sure0
my guess now is the front wheels are dead.
back wheels must spin , if brakes drag, one will slower.. (oops another problem)
but front is dead, and so is the front actuator dead. the front prop shafts spins, but of the actuator is dead, the left axle unlocks.
to discover why, takes a vacuum pump
as no sane person would go under running engine with 2 live prop shafts. are you following me?
what i do is test the actuator with only left
wheel side on jack stands, right tire ground
the actuator is right there, see its vacuum diaphram casing, sure, see its vacuum nipple
i apply vacuum there.
in 4wd, park (a/t) or m/t in 1st gear.
i apply say 10 inches of vacuum or more.
causes the actuator to move and the tire left locks up. (feel by hand turning tire)
the front prop shaft can not move. in this mode.
allowing me to test left front lock.
if spins free, the actuator is failing
if this locks, then the cars vacuum switches are failing. more tests.
im not going to document this part, (too long)
this is very simular to a jeep system with vacuum
other cars use a pressure pump there.
all versions of 4wd have different ways to test
in a shop.
why not go a 4wd shop. and get help
or any ASE shop in town?
that was the easy part.
the motor version, we hot wire the motor
to see it work.
using this drawing
unplug it first
hot wire the 2 pins,
always observe polarity
check voltage there in 4wd
if 12vdc there, then the controls are are working
and if yes,,you now know which pin is Plus.
my guess pin 4 is plus 12v
this step replaces vsv tests above.
its just an electric motor here.
the transfer case (frontprop shaft dead symptoms)
on this car it has motor too.
and a controller
the controller need the backup fuse good
then the transmission not in neutral,sends
12vdc power from neutral (not) goes to the controller to the motor drive controller
testing all this is tedious.
id check the motor there first on the transfer case.
mitchells has the drawings for all this.
see them now.