I really love my bronco, but some days. My '96 Bronco ABS light is on with no speedo, OD light flashes and hard shifting. We have put new rear gears in, with new exciter ring, new VSS and changed out the PSOM from a '94 F150 same part number. No help. Only code is P0500. The plug to the VSS is loose, but no apparent wires broken. I will appreciate any and all help. Thanks
ABS light, No speedo, hard shifting. Were these the same symptoms before the PSOM swap? P0500 code...can't even find that one. I have no ODB-II books though. Is your REF voltage on the right wire at the VSS?
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Bob K
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2000 Ranger X-Cab 4x4 The missus' rig
1986 Bronco, 302/AOD/Dana60/5.38s/Detroit Dana44HD/5.38s/36"Swampers/Roll cage/on board air/shimano index shifter throttle control/ the project rig.
first off the psom's are year specific. you can not run a 94 psom in a 96 and there may even be variances between bronco and f150's for this perticular component. Also why was the tone ring replaced? there is no carrier break for the 8.8 rear diff. Can you please give a reason why these items where messed with in the first place?
Ok here goes the details behind what was done. Go get something to drink and snack on as this may take awhile,lol!
The original rear gears destroyed 4yrs ago( no gear lube makes a nice silver metal paste and a horrible noise). We swapped out complete rear axle several years ago from a donor '94 F150 with same motor and rearend. Speedo jumped a bit. Tone ring was questionable( donor truck had 351000 mi. on it and supposedly rebuilt). Last summer our daughter curbed the Bronco and drove aprox 10 miles and parked the truck. When she got back in and started it the ABS light was on, no speedo and hard shifting with OD light flashing. Checked tranny fluid, level good and not burnt. My husband wanted the original rear axle back in it anyway so we purchased new gears and had them installed plus we now have limited slip. This unfortunately did not correct the problem. I have a code reader and pulled the codes and the only one that comes up is P0500 ( VSS malfunction). I spent the $14.00 and got a new VSS. No help. After reading several posts here we swapped the PSOM from the '94 F150. It has the same Ford part number so why wouldn't it work? It didn't help anyway. We disconnected the battery overnight to clear codes as clearing with the code reader didn't shut the ABS light off. The ABS light was still on after reattaching the battery in the AM. I tried to read the ABS codes by jumping B&E removing jumper after 5 sec. No flashing, thus no codes to read. Now I admit I could be doing something wrong but I don't know what.
The plug for the VSS is loose, missing both clips. Should we replace it? I am at a loss as what to try next.
I think that covers everything. Thanks for the help.
sounds like your abs module located under the radiator overflow tank is messed up.
does the odometer show the miles still by chance? if so then the module is definatly the problem here. i had this very issue on my 94 bronco awhile back.
if you unplug the connector from the abs module and then jumper 14 to 21, & 39 to 22...then climb into the rig and start it up and drive. what your basicly doing is taking the module out of the loop and this should restore the speedometer and the proper shifting behavior. once this happens i would go to a wrecking yard for a abs module from your year bronco.
Well I went out to try what you suggested Khemicalburns and got to thinking. Why can't I pull ABS codes, everyone else gets to be guided by them. So I decided to go back and check all wiring, fuses,etc. Lo and behold the fuse in position 5 in the box under the hood was blown. I replaced it with a 15 amp fuse and turned the key to the ON position. The Check Engine and ABS light went off. I stood there in shock for a second and decided to button her up and go for a test drive. It's fixed! Now I know my husband checked all the fuses when this first started so I am at a loss as to when this blew and what it is for. At this point I almost don't care. However as I am driving it I hear a slight whine which seems to be coming from the trans. In talking to my daughter she came clean about the fluid level in the trans when this first started. It was a drop on the end of the dipstick. She was afraid to tell us as she has been taught how and when to check fluid levels. Ruth, my bronco has alot of miles and needs to be watched closely.She put a few Quarts in until it read normal. Teenagers! We found the leak,connection into the bottom of the radiator.Now say a prayer that the trans is not damaged too bad.
Thankyou for all your help! More grateful than can be expressed.
I would just perform a fluid/filter change out and that should take care of it. Glad it was just the fuse, its always nice to have another set of eyes to go over everything.
that whine may also be coming from the steering pump or even the tcase.
Fluid/ filter change was my next step. The whine truly seems to be coming from under the hump between the front seats. I've heard power steering pump whine and this is different.
It still amazes me that one fuse can affect so many systems.
well check the tcase fluid also since its chain driven and can whine like that also. your daughter knows to check the tranny fluid with the vehicle running right.
Yes she has been taught basic maintenance and is the only one of her friends, inc. some male friends, who knows how to change a tire. I wanted to make sure as a female that she knew how to take care of herself . Unfortunately there are still some mechanics who would try to take advantage of her just for being female. BTW teaching a teenager something and having them do it can be tricky,lol! So we play the nagging parents and remind,remind,remind.
i hear ya there. I have a 14yr step daughter. the fun for me is just beginning. its great that your teaching her this stuff. very important.
just curious the new psom you installed does it show the proper mileage? if not you might throw the original one in there unless of course this new one is showing fewer :-)
We plan on putting the original PSOM back in as it only has over 200,000 miles and the donor one has 351,000. :-) Just proves how well Ford builds them. The donor truck actually ran, we drove it here when it was given to us 4 years ago when my first rearend went bad. Been kinda nice walking over to it for parts instead of going to the parts store or boneyard, lol!
what size tires are you running currently on the bronco? if they are 31's or larger you might check to make sure the proper calibration is in place on your psom. this will ensure the tranny behaves and shifts when it should and also makes sure the speedo is acurate. i did this when i went to 35's and my speedo is right on.
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. My '96 Bronco ABS light is on with no speedo, OD light flashes and hard shifting. We have put new rear gears in, with new exciter ring, new VSS and changed out the PSOM from a '94 F150 same part number. No help. Only code is P0500. The plug to the VSS is loose, but no apparent wires broken. I will appreciate any and all help. Thanks
