Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!





Isuzu Trooper Alternator Problems

toomean2toomean2 Posts: 1
I have a 95 isuzu trooper type s a/t recently my batter went bad and was since replace. however it drained quick and would not hold charge. i replaced the alternator and my lights are still dim and only running at about 11 to 12 volts while idle and driving. we tested the alternator but it is fine at 15 amps. anyone have any ideas what is causing this? please help
«13

Comments

  • matausmataus Posts: 43
    I really hope someone can help me with this. I have a 1991 Isuzu Trooper with 2.8 liter/5 speed manual trans. I love my Isuzu! It kicks butt! The problem I am having is this...

    I keep going thru alternators. In the last few months, I have gone thru 3 of them. It's really starting to get frustrating. When they start to go bad, I notice a humming squeak like noise. Like the brushes are rubbing inside. Then from there, I notice my truck having more difficulty in starting from the lack of power in my battery. It is obvious that my alternator isn't proving the power to my battery to start like it should. I did replace my battery with a new one, and still the problem persists. One thing I did notice is that it is more relevant in the cold. Also, when my alternator starts to go bad, my headlights, dash lights, any light, starts to randomly dim/increase up and down. I do have fuses attached to everything powered by the battery. So to protect against surges or whatever problem may arise power wise. I am thinking that if there is a short somewhere causing my alternator to go bad, wouldn't a fuse blow?

    Anyhow, thank you for taking the time to listen what I have to say. If there is anyone out there who can help me with this, it would be greatly appreciated...
    Thanks,
    Tracy...
  • boxtrooperboxtrooper Posts: 843
    It sounds like you have an excessive load on your alternator that comes and goes when it pleases. I would find all the wires that are visible, start near the alternator, search the engine compartment then look under around the frame all the way back. Since you did not mention smelling smoke or roasting plastic wire insulation, I expect the problem is not inside the Trooper. Do you have a trailer hitch wiring adapter? Those can sometimes go bad and cause excessive loads and strange behavior of other lights in the dash etc..
  • atfdmikeatfdmike Posts: 414
    Hi, All the symptoms you describe all relate to the alternator going bad and the resulting low voltage. There were two alternators used, one with higher output than the other. You want to make sure you are getting the right one, or upgrade to the larger alternator if you find that there are no other problems like Boxtrooper refers to. Make sure when you attach the battery wire to the alternator that the terminal is not touching the alternator housing after you tighten it. Good luck
  • matausmataus Posts: 43
    Thanks a bunch for replying to my post.
    There were a couple things I did forget to mention. When my alternators went bad, I would have them checked at my local auto store for amperage. One thing that was noticeable, is that one alternator had lover voltage compared to the other that had more voltage then the norm. I do disconnect all the wires from my battery before I add leads/grounds to my alternator. I do have a fairly nice stereo with a somewhat high power amp attached to it. Is it possible to add a higher power alternator to my truck?

    Tracy
  • boxtrooperboxtrooper Posts: 843
    Here is a place that specializes in after market alternator upgrades, I have not used them, but they have a nice website:
    http://www.zena.net/htdocs/alternators/AutoSound2.shtml#Top
    ..
    Also, a bigger capacity battery might help prevent loading the alternator especially if the load is off more than on, here is a battery that will fit the Trooper battery box and has something like three times the cranking amps and and can be used in deep cycle mode without damage:
    http://www.lifelinebatteries.com/marineflyer.php?id=3
    ..
    Note: Measure your battery box before ordering, I have use the Lifeline battery and an inverter to let my kids watch two movies and then the news while powering a fish aquarium every night for a week after a big ice storm.
  • on the back of the ingersol alternator are the battery post, and one post that is labled W and the other post is labled D+. on the new ford alternator there are three posts as well but these are battery, P and the other is an R which match up? does the wire that went to the W go to the P or the R? and the same for the wire that went to the D+ does it go to the P or the R? thx steve
  • paisanpaisan Posts: 21,181
    um this is the Isuzu board....

    -mike
  • sorry... first time user of this site. where do i go for this problem?
  • paisanpaisan Posts: 21,181
    Hmm try the Ford section, should be under the pickup-section.

    -mike
  • tidestertidester Posts: 10,110
    You may also want to try Got a Quick, Technical Question?.

    tidester, host
    SUVs and Smart Shopper
  • cacianocaciano Posts: 1
    i have 2001 trooper 4w limited edition.Today i was driving my truck and it look like my transmission failed because while driving i started noticing that when i pressed the gas it would make a noice like if the transmission dragged a little,and it would do it only when you came to a complete stop and would try to get speed again so at that time i tried to check the oil level but couldnt fing a stick gage.i also notice a light saying check transmission came up and turn off and did not come back on it just gave me a warning. I look at the bottom of the truk i found some transmission oil leakage very minor,it covered the pan but not leaking in excess or anything do you think is a transmission failure or maybe it could be a broken seal or not enough fluid in the pan ..no problems with reverse gear or any other gears just at the time of punching speed.
  • paisanpaisan Posts: 21,181
    You probably lost enough fluid to overheat it. I'd get it drained and filled and go from there.

    -mike
  • My 95 Trooper (3.2L DOHC) was freaking out on me. Ocassionally the check trans lights would start flashing along with the air bag light. The tranny would barely start moving and the alt. gauge was pegged at 16 volts. It would dissappear when slowed down (engine RPM's were down) then start running perfect.
    I changed the alternator and it cured everything. Too much voltage was being produced. I had a power steering leak which covered the alternator in muck & goo and probably led to it's demise.
  • atfdmikeatfdmike Posts: 414
    Yeah, my first alternator gave me fits too but once I changed it and cleaned up PS it is fine.....knock on wood!
    Welcome to the forum, it is a good place with nice people...but then, we all love our Isuzu's, don't we?
  • Wow, a site for Troopers! Fantastic.
    FIRST HINT OF TROUBLE:
    drove home one night and my lights started to go bright and dim as I drove and reved the engine but the next night and there after they ran steady...until it rained, and all my dash lights come on, then the engine stalled and I blew out the Fuel Pump relay.
    Charged, dried drove and next rain, all the dash lights came on and it just eventually died
    REMEDIES
    To check for a short, I have disconected the NEG and attached a test light which did not light so I assume there is no short. I hosed the car from hood, tested again, still no sign of short.
    Attached the NEG and a voltmete: Battery still at 12.67
    Started the engine. Still 12.67 Reved the engine, no change
    Turned on lights, 12.14
    Turned of engine, back to roughly 12.6~
    Also, when I reved the engineI noticed a "clanking sound' coming from the ALTERNATOR area but couldn't be possitive.

    QUESTION:
    Does it sound like a bad alternator to you?

    Thanks for your help
  • atfdmikeatfdmike Posts: 414
    Yes, I would say that your alternator is bad. Once you have changed the alternator, hopefully the clanking will be gone. HOWEVER..........if not, then I would check all the belts to make sure no chunks are missing or flipped. If it is a true clanking sound, you may be able to isolate it by carefully using a long screwdriver by placing the tip on various engine parts and placing your ear on the handle .....the sound will be maginified and you can work your way to where it is loudest. I am thinking you have a 4 cylinder, so if you don't know the history, you could have a bad timing belt, or tensioner bearing, or other part that is bad. I think the timing belt is only good for about 60000 miles on your trooper. The clanking sound is usually a symptom when the hydraulic tensioner is bad. I am more familiear with the V6 though.
    Let us know what you find and keep us posted! Good luck and WELCOME to the forum! Lot of nice people here that like to help.
  • geagleburger, I hope you can help me out. I seem to be having a similar problem. My 94 Trooper died one day, took it to NAPA, they said it was probably the alternator. I noticed some goop all over what I believe to be the power steering pressure hose.

    Did you figure out that all the goop from the leak caused the demise of your alternator? Did you replace the alt and p/s hose? Any info or advice you have would be greatly appriciated!
  • atfdmikeatfdmike Posts: 414
    Hi, thought I would offer my 2 cents worth here. It is a pretty common complaint that PS oil leaking onto the alternator due to its location underneath is why they fail. Given the Isuzu propensity for strange electrical problems, it is wise to replace the hose or the washers at the joint if that is where it is leaking. Getting a good name brand alternator or a reliable rebuild on your old one is important too. Seems like a lot of owners that get the neighborhood part store rebuild have problems earlier on than those that go with original or Bosch. HTH One guys opinion!
  • utrooperutrooper Posts: 2
    Hi all,

    Glad to find fellow Trooper fans! I have a 95 Trooper LS with 210K miles on it. Driving today the "check transmission" warning light started blinking while we were driving at a slow speed. After I stopped and read the owners manual, sure enough I had to start in L and manually shift to get home (thankfully only a few miles). Apparently the computer when sensing a problem automatically bumps you into the manual mode. I checked the level and color of the transmission fluid and it was dirty and seemed low which leads me to believe it just needs a flush (I have had the car for almost 10 years and don't recall ever doing this). This is our first "problem" with the car since we have owned it and I am hoping it is only the transmission fluid. Any suggestions or other ideas? Thanks!
  • kayreenkayreen Posts: 6
    Hi, my trooper 3.1td 1998 has been doing odd things! Went out got back in the car turned the key just clicked. Tried jump starting, no luck. Called out a mechanic started car but batteries very low in charge, meter had said 8 volts previously. Charged up batteries started the next day. Yesterday got in turned key nothing! I suspect alternator. Mechanic came out again brought auto electrician alternator seems to be charging! I use my car for going up and down to farms. Could wet and crap have got in and be discharging the charge from the alternator? If I get a new one I have been told to make sure I get the right one as otherwise olil pipes will not match up? Help!! I tow horses and cannot have it break down on me with them.
«13
Sign In or Register to comment.