# 2003 Eclipse Alternator Problem **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** eclipse, mitsubishi, alternators\ **Created:** [September 15, 2016, 11:33pm UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685 "2016-09-15T23:33:26Z")\ **Posts on this page:** 20\ **Page:** 3
**Author:** ![JLB2](https://avatars.discourse-cdn.com/v4/letter/j/4bbf92/32.png) [@JLB2](https://community.cartalk.com/u/JLB2)\ **Post date:** [September 19, 2016, 8:50pm UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/41 "2016-09-19T20:50:45Z")
Back to this: **kurtwm2010 23h 1  JLB2** **get a new alternator and in case you continue to have that problem, take it back. What you have to lose, but a little time? If you are inclined to replace the thing yourself.** (& obviously I have not figured out how to “quote” on this forum yet) Here’s a fly in the ointment . . . I explained the entire situation when I called my local O’Reilly’s. Their reply was, “Since it’s a rotating electrical part, we won’t take it back.” Subsequently, their district manager called to say they will accommodate me. So, thumbs up to O’Reilly. 👍 ---
**Author:** ![kurtwm1](https://avatars.discourse-cdn.com/v4/letter/k/13edae/32.png) [@kurtwm1](https://community.cartalk.com/u/kurtwm1)\ **Post date:** [September 19, 2016, 8:57pm UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/42 "2016-09-19T20:57:32Z")
yes, that’s a bummer. I don’t know how the other two big ones handle it (Autozone and Advance Auto Parts). Another cheap alternative might be to go for a used one from a junk yard or taking it to a mechanic who knows what he/she is doing. ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [September 19, 2016, 9:44pm UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/43 "2016-09-19T21:44:22Z")
It still sounds like a voltage regulation problem to me, which points to the ECU and its assocated wiring. ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [September 19, 2016, 9:46pm UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/44 "2016-09-19T21:46:43Z")
[quote=“kurtwm2010, post:42, topic:95685, full:true”] yes, that’s a bummer. I don’t know how the other two big ones handle it (Autozone and Advance Auto Parts). [/quote]Except for the Valuecraft line, alternators sold at AutoZone have a limited lifetime warranty. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [September 19, 2016, 10:01pm UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/45 "2016-09-19T22:01:38Z")
In general auto parts suppliers do not take back electrical parts, there is no alternator loan program. You need to take a half hour of time to diagnose the charging system. ---
**Author:** ![JLB2](https://avatars.discourse-cdn.com/v4/letter/j/4bbf92/32.png) [@JLB2](https://community.cartalk.com/u/JLB2)\ **Post date:** [September 20, 2016, 12:09am UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/46 "2016-09-20T00:09:49Z")
. . . . . .👍 issue resolved ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [September 20, 2016, 12:29am UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/47 "2016-09-20T00:29:21Z")
Too many times guys buy a part, keep it on their car, clean the old, bad, part, bring it to the store, and say they didn’t need the part, and want their money back, claiming their old part is the new part, which the don’t need And then the next sucker buys that alternator, thinking they’re getting a rebuilt alternator. When in fact they’re just paying for somebody’s 20-year old non-functioning alternator Not saying that YOU would do it, but plenty of people have low morals and would sleep well at night, after pulling that stunt It’s far too risky for an auto parts store, IMO No offense intended, but there’s always the other side to consider ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [September 20, 2016, 3:13am UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/48 "2016-09-20T03:13:02Z")
> [@ok4450](#): > > I don’t understand the purpose or logic behind testing the battery to alternator lead with both probes of the VOM and expecting to get a voltage reading. > Just for hoots, I checked 2 cars here this morning using both the 20 V and the 200/2000 Millivolt scale and 0 on both. You won’t measure a voltage between the alternator B+ post and the battery positive post unless current is flowing between them; i.e. the alternator is charging the battery or supplying current to power an accessory, like the headlights. I’ve measured that voltage on my Corolla quite a few times when diagnosing charging and battery problems, around 0.1 to 0.3 volts is what it measures usually, if I do the measure first thing in the AM on first starting the car so the alternator will be giving the battery a little boost from sitting overnight. hmmm … Be sure to set your DVM to measure DC volts. I usually use the 2 volt or 0.5 volt scale. Then put one DVM probe on the alternator B+ post, and the other on the battery positive post. The engine has to be running of course, otherwise the alternator won’t be producing any current to flow in the wire. I think it’s great you took the time to do the experiment @ok4450 , but it is confusing to me why you measured 0 volts. Sometimes I can get a bad connection between the probe and one of the posts b/c of corrosion, that may be what’s happening in your case. Double check the probe is making a good connection by measuring each point to battery ground or a chassis ground maybe first. If you get no voltage then, you know you aren’t making a good connection. hmm … what else could be causing yoru 0 volt measurement? Well, if the battery was already fully charged then the alternator wouldn’t need to charge it, so you might read 0 volts. Try turning a bunch of electrical equipment on maybe, like the headlights on bright, the rear window defroster (if you have one), heater blower motor to max, etc. Maybe that will be enough to kick the alternator into charging mode. And maybe somebody else here could try it on their cars, report what they measure. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [September 20, 2016, 3:19am UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/49 "2016-09-20T03:19:56Z")
> [@JLB2](#): > > alternators from O’Reilly do have a (limited) warranty. They just have a “no return” policy on them. I purchased a rebuilt starter motor one time from a national parts chain and it didn’t work, and they gave me that line when I took it back for a refund. The verified the one they sold me tested bad. At first the staff there said the only remedy available is they’d replace it with another one. That didn’t work for me though, b/c I’d lost faith in their process. I mean if they had the capability to test it, why didn’t they test the one they sold to me the first time? Anyway, I went back and forth with the manager there and eventually we came to a compromise where they’d credit me the full amount with a store card which I could use for future purchases. I used that to purchase consumables, oil, coolant, and the like, so it worked out ok for both parties. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [September 20, 2016, 3:46am UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/50 "2016-09-20T03:46:38Z")
Testing the integrity of the alternator to battery circuit is a part of the diagnostic procedure. A problem in that circuit usually only occurs if someone connects jumper cables incorrectly. About 5 years ago I couldn’t help but notice a co-worker replace an alternator on a car with less than 10,000 miles on it. The next day he replaced the battery, then 3 days later the PCM. The last thing he replaced was the 140 amp charging system fuse, that was a $2,000 fuse. I had confirmed that this company hires people that can’t use a DVOM or apply practical diagnostic procedures. ---
**Author:** ![kurtwm1](https://avatars.discourse-cdn.com/v4/letter/k/13edae/32.png) [@kurtwm1](https://community.cartalk.com/u/kurtwm1)\ **Post date:** [September 20, 2016, 4:13am UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/51 "2016-09-20T04:13:43Z")
> [@Nevada\_545](#): > > A problem in that circuit usually only occurs if someone connects jumper cables incorrectly. I disagree. Alternators go dead all the time. Wires inside start melting and fusing together, diodes have a tendency to burn out (resulting exactly into the problem the OP is having), and the voltage regulator burns out frequently. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [September 20, 2016, 4:35am UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/52 "2016-09-20T04:35:24Z")
> [@kurtwm2010](#): > > I disagree. Alternators go dead all the time. Once again; \_Testing the integrity of the alternator to battery circuit is a part of the diagnostic procedure.\__A problem in that circuit usually only occurs if someone connects jumper cables incorrectly._ Diode and other internal alternator failures are most common but the circuit between the alternator and battery must be tested. ---
**Author:** ![kurtwm1](https://avatars.discourse-cdn.com/v4/letter/k/13edae/32.png) [@kurtwm1](https://community.cartalk.com/u/kurtwm1)\ **Post date:** [September 20, 2016, 4:47am UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/53 "2016-09-20T04:47:43Z")
I may have misread your statement and interpreted and missed that you were referring to the circuit between the battery and alternator. My mistake ---
**Author:** ![sgtrock21](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/sgtrock21/32/246_2.png) [@sgtrock21](https://community.cartalk.com/u/sgtrock21)\ **Post date:** [September 20, 2016, 5:21pm UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/54 "2016-09-20T17:21:07Z")
As far as I know there is normally a no return policy on electric parts everywhere unless the part is defective. ---
**Author:** ![JLB2](https://avatars.discourse-cdn.com/v4/letter/j/4bbf92/32.png) [@JLB2](https://community.cartalk.com/u/JLB2)\ **Post date:** [September 20, 2016, 10:09pm UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/55 "2016-09-20T22:09:22Z")
I have edited Post #40, as that issue has changed for the better. 👍 ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [September 20, 2016, 10:23pm UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/56 "2016-09-20T22:23:01Z")
Post # 40 has been edited-you really expect someone to count posts ? ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [September 21, 2016, 1:32am UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/57 "2016-09-21T01:32:35Z")
> [@Nevada\_545](#): > > Testing the integrity of the alternator to battery circuit That’s a reason to do that voltage measurement mentioned above, between the alternator B+ and the battery + posts. ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [September 21, 2016, 3:14pm UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/58 "2016-09-21T15:14:47Z")
You don’t have to count them, just look on the right side as you scroll upward. Post count is displayed there. Although I would prefer a new post, it’s not all that difficult to find the one he edited… ---
**Author:** ![sgtrock21](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/sgtrock21/32/246_2.png) [@sgtrock21](https://community.cartalk.com/u/sgtrock21)\ **Post date:** [September 21, 2016, 5:38pm UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/59 "2016-09-21T17:38:21Z")
I used the post counter thingy on the right. ---
**Author:** ![JLB2](https://avatars.discourse-cdn.com/v4/letter/j/4bbf92/32.png) [@JLB2](https://community.cartalk.com/u/JLB2)\ **Post date:** [September 22, 2016, 9:21pm UTC](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685/60 "2016-09-22T21:21:33Z")
I’m happy to report that the new alternator is on and is working fine. 😌 [Previous page](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685.md?page=2) [Next page](https://community.cartalk.com/t/2003-eclipse-alternator-problem/95685.md?page=4)