Engine/Transmission (1994 - 1998) (Gen) light on dash

[IPULLRV]

The red "Gen" light on the dash is on. Nothing in the mannual about it. I never saw it before. Can anyone help? Why is this light on? HAPPENED WHILE DRIVING --AMP METER OK STILL CHARGING



1996 AUTO ,105 GAL AUX TANK,115000 MILES

 

[grtescpa]

Originally posted by IPULLRV

The red "Gen" light on the dash is on. Nothing in the mannual about it. I never saw it before. Can anyone help? Why is this light on? HAPPENED WHILE DRIVING --AMP METER OK STILL CHARGING



1996 AUTO ,105 GAL AUX TANK,115000 MILES

I had the same thing happen to me after a driving wind and snow storm. The light stayed on for a day or two and then finally went out. The whole time I never lost the charge rate. ???

 

[Bigramguy]

Same here,driving in a downpour for a few hrs,light came on,and went off a few days later. Never seemed to affect charge rate. Alt lasted a year after that. Maybe it got wet,try drying it out.

 

[Wirenut]

I kept having it come on too. Noone could tell me what it was and neither does the manual. Eventually I had to replace the alternator. The light started happening months before on and off.

 

[stick]

Must be some kind of bug going around, mine did the same thing about a week ago. Still haven't figured it out !



Stick

 

[IPULLRV]

INTERESTING FEED BACK--HOW MUCH DOES ALTERNATER COST

 

[Wirenut]

Looks like it's a 97 thing. I forget how much it was. I'm thinking somewhere in the 80-120 range.

 

[Jff24Gordn]

Mine comes on every once in a while, usually from snow or rain. I just wiggle the wires on the alternator, and it starts charging again and thew light goes out.

 

[braible]

you might what to keep this in mind

I had the same problem with my 97, so I went to the stealer to have them test the charging system. they told me it was the alternator. So I bought one a reman. put it on, guess what that was not it . after paying $284 for that.

So i go back to the stealer, and told them they where wrong, and test it again. Now it is the PCM, because the voltage regulator is in the PCM. that was a real smart move by D/C because it was

$528 from the stealer . but now it is fixed for now.

 

[Bigramguy]

You may be right on the PCM being the problem. I replaced my alt with a Leece-Neville unit because it was close to $500. 00 CDN for a new alt from the dealer. I bypassed the PCM,it now has no control over the alt (the way it should be ),and my problem was gone. Maybe it was the PCM after all.

 

[stick]

How about a part number for the Leece-Neville unit for future referance.



Stick

 

[Bigramguy]

The Leece-Neville unit is not a direct bolt on. It takes a bit of work to do,but is way cheaper,and a way better alt setup.



Here is a link to the previous thread I posted with part numbers,pics and other info.



If you have any more questions,just let me know -- email address removed --

 

[Bigramguy]

Doh !!! Would have helped if I actually posted the link,here it is.



https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=34554

 

[Monroefiredog1]

Bypassed PCM Voltage Regulator

Originally posted by Bigramguy [/i]

You may be right on the PCM being the problem. I bypassed the PCM,it now has no control over the alt (the way it should be ),and my problem was gone. Maybe it was the PCM after all.



I was just wanting to bypass my pcm, do you have any wiring diagrams on this setup? If so I would like to see how it was done, so that I can do it correcly. Any help on this matter will greatly be appericated.

 

[Andy Redmond]

Our trucks have an external voltage reg. mounted to the back of the alt.



Below is the technical info as provided by Nippondenso.



ER/IF Alternator for Nippondenso

120 Amp, 12 Volt, CW Rotation

Reg. Type: ER (External Regulator)

Fan Type: IF (Internal Fan)

Pulley Type: 8S

Mtg. Ear Clocking: 12:00

Mtg. Ear Hole Size: 11MM



Contact me off the list for pricing for new ND products should you have need for them.



The dealerships sell many PCM's when a new alternator often solves the problem and the customer has shelled out some serious clams.



Some late models use Bosch. . I think they are interchangable?



Good luck, Andy