Gen 2 light off then on

[UNIMOG-GUY]

Guys after reading as many Gen 2 light threads as I could I still haven't found anyone who has the same problem I am having. I would appreciate any and all help.

Key in ignition idiot lights come on (oil, water, wait) Gen 1light is on Gen 2 light is off. Volt gauge off below the red. Wait 20-30 seconds and the Gen 2 light comes on and the volt gauge goes up to normal. When you turn the key nothing happens. Starter doesn't engage. And you return to the Gen 1 light on Gen 2 light off. Wait 20-30 seconds and the Gen 2 light comes on and the volt gauge goes up to normal.

I just replaced the GPR with Napa ST-85 since I had the black plastic original military relay. I replaced it after I had the problem. Got in the truck same problem as before nothing has changed. Tomorrow I am going to do the "Doghead Mod" to see if it has any effect.

If you have any suggestions or advice I would greatly appreciate it. Thank you in advance.

 

[Barrman]

When you swap out the starter relay, put a volt meter on the purple with white stripe wire. Turn the key to start and see if you get 12 volts on that wire. It sure reads to me as if your ignition switch isn't adjusted correctly or is just bad.

Fix the starter issues first. Then the glow plug issues and then worry about the alternators. Do them 1 problem at a time.

 

[mistaken1]

Load test the batteries?

 

[UNIMOG-GUY]

Yep it was the batteries...I put 2 brand new yellow top optimas in (which were in my 404) and now she starts up and runs. I guess I should have started with the batteries. But then again it did force me to swap out the starter relay and the glow plug relay. So all in all I'm glad it happened.

Thanks again for the help.

 

[1stSarge]

Thank you for the follow up.

 

[Warthog]

Another battery issue resolved. Good Job.

I try to spread this word, "before starting any electrical troubleshoouting, make sure the batteries are fully charged and load tested".

 

[UNIMOG-GUY]

I think load tested is the key word. As mine were fully charged but not load tested.

 

[Warthog]

I think load tested is the key word. As mine were fully charged but not load tested.

Roger That!!!