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Isuzu Trooper Alternators keep going bad

28 messages,  Last post on Mar 31, 2009 at 4:08 AM

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#19 of 28 Re: bad alternator [friedrickjoel] by atfdmike Apr 21, 2008 (2:11 am)
Replying to: friedrickjoel (Apr 18, 2008 10:44 am) 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!
#20 of 28 Check Trans Warning Light by utrooper Jun 08, 2008 (4:53 pm)
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! Replies to this message: atfdmike (Mar 07, 2009 8:26 am)
#21 of 28 Trooper not starting by kayreen Mar 07, 2009 (3:27 am)
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. Replies to this message: atfdmike (Mar 07, 2009 8:39 am) kayreen (Mar 07, 2009 1:32 pm) bushwacker1 (Mar 08, 2009 10:21 am) kayreen (Mar 08, 2009 11:34 am)
#22 of 28 Re: Check Trans Warning Light [utrooper] by atfdmike Mar 07, 2009 (8:26 am)
Replying to: utrooper (Jun 08, 2008 4:53 pm) Generally speaking,it is not a good practice to get a flush if the trans has that many miles. It seems to lead to problems like sticking valves and future problems, since a flush has a tendency to loosen deposits but not get them all out.. It is better to do a filter change and fluid change and do it again in 10,000 miles. You did well to get that many miles with no attention. HTH
#23 of 28 Re: Trooper not starting [kayreen] by atfdmike Mar 07, 2009 (8:39 am)
Replying to: kayreen (Mar 07, 2009 3:27 am) One way to determine if it is the alternator on a Trooper is to see if the heater/AC blower turn on while the engine is running. If it does not, then it is alternator. Japanese wired the system so if alt quits, most unnecessary accessories don't work. The alt is mounted in the worst place,down low on engine, not hard to change but it is exposed to water from splashing and mud since it is so low. Usually not a problem unless you go offroad or are in mud and rain a lot. There is a shield on it, but it is not very big. If the engine starts, the indicator lights often light up illogically if it is the alternator too. Brake warning, ABS, etc light up too. Rebuild alts are fine if OEM or Bosch. Still not cheap, but at least they work right with Isuzus. HTH one guys opinion. Replies to this message: kayreen (Mar 07, 2009 1:32 pm)
#24 of 28 Re: Trooper not starting [atfdmike] by kayreen Mar 07, 2009 (1:32 pm)
Replying to: atfdmike (Mar 07, 2009 8:39 am) Many thanks for that, my AC/Heater does not come on right away I have to wait a while before it comes in. Had a look at the terminal on the alternator and a wole load of rusty mush came out. I suspect that it is the problem. We have wet cold here in Scotland!! Many thanks again. Will change it. Cheers Kayreen
#25 of 28 Re: Trooper not starting [kayreen] by bushwacker1 Mar 08, 2009 (10:21 am)
Replying to: kayreen (Mar 07, 2009 3:27 am) I had the same issues: replaced starter first then battery & all cables.... worked for a white then it rained and my RELAY SWITCH blew. I replaced it & the alternator and have had no problems since. NOTE: My Trooper sat for days on end and still started up NOTE: I have since given it to my nephew in college and back hills bike riding and it continues to start right up. Replies to this message: kayreen (Mar 08, 2009 11:34 am)
#26 of 28 Re: Trooper not starting [bushwacker1] by kayreen Mar 08, 2009 (11:34 am)
Replying to: bushwacker1 (Mar 08, 2009 10:21 am) Many thanks I am going to replace the alternator!! I cannot have it deciding when to go and not go!! Best wishes Kayreen
#27 of 28 86 trooper charge problem by izzbo1 Mar 30, 2009 (1:14 pm)
I have an 86 trooper I just bought yesterday. brake and alternator warning lights are on intermittantly when running. When they are on, my tester says the alternator is only putting out 11 volts. When/if they go off, my tester says it is putting out 14 volts. Supposedly the alternator was JUST rebuilt (days ago). Is tthis simply an alternator problem or could it be something else in the system? how can I track it down? Thanx Replies to this message: atfdmike (Mar 31, 2009 4:08 am)
#28 of 28 Re: 86 trooper charge problem [izzbo1] by atfdmike Mar 31, 2009 (4:08 am)
Replying to: izzbo1 (Mar 30, 2009 1:14 pm) It sounds like a bad alternator to me. Even fresh out of the box, some alts are not right. There are diodes in the alt that can be bad and the alt will still test as OK. Getting a quality rebuild on the alt is generally necessary.....cheap ones don't seem to hold up or work at all in many cases. Your year has two style of alt....one with IC regulator built in.....one outside. If your voltage regulator is outside, that is likely the cause.....otherwise, you seem to need to replace the alt. Make sure though, that the ring terminal on alt is not close to or grounding on alt case. Very commom problem when installing and tightening terminal nut. If it is OK, then above would apply. Part nos. at www.myisuzuparts.com HTH One guys opinion

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