Ammeter pegged 68 D-200

Wiring, lights, heater controls, anything electrical..

Ammeter pegged 68 D-200

Postby realgone58 » Tue May 30, 2017 11:48 am

I've done a new battery, alternator, voltage regulator and ballast. All is hooked up correct according to the wiring schematic. Drove for about a thousand miles with no problems, then just yesterday, under throttle, started making a light whistle under the hood and immidiately pegged the ammeter above charge, as high as it could possibly go. I pulled over right away, at idle it came down to normal (just above center line), got out and opened the hood, felt for hot wires, didn't find any, nor any burning smell, got back in the truck, hit gas, way above charge again, then all of a sudden the light whistle stopped and the ammeter quickly bounced back to normal. Several more miles with no problem, then did it again for a few minutes. Been doing it on and off again today. I must have something going bad. Any ideas? Also can't get brake lights to work, but that's a thread for another time. Lol.
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Re: Ammeter pegged 68 D-200

Postby PwrWgnDrvr » Tue May 30, 2017 1:29 pm

Bad regulator.
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Re: Ammeter pegged 68 D-200

Postby realgone58 » Tue May 30, 2017 3:35 pm

Forgot to mention this is the second regulator I've put on. First one, just stopped charging. What would keep blowing the regulator?
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Re: Ammeter pegged 68 D-200

Postby MadMC63 » Tue May 30, 2017 4:13 pm

Definitely sounds like a bad regulator. That whine is a dead giveaway. A fully energized field/ max charge.
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Re: Ammeter pegged 68 D-200

Postby PwrWgnDrvr » Tue May 30, 2017 7:15 pm

realgone58 wrote:What would keep blowing the regulator?

Made in china
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Re: Ammeter pegged 68 D-200

Postby wally426ci » Tue May 30, 2017 10:02 pm

Agreed. Go with NOS Chrysler or repop Chrysler at least
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Re: Ammeter pegged 68 D-200

Postby MadMC63 » Wed May 31, 2017 5:17 am

I watched a video on YouTube on how to test your voltage regulator. The guy had one known bad one and three new ones. Two of the three new ones were bad out of the box. Not good odds.
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Re: Ammeter pegged 68 D-200

Postby dodgeboykim » Wed May 31, 2017 2:26 pm

MadMC63 wrote:I watched a video on YouTube on how to test your voltage regulator. The guy had one known bad one and three new ones. Two of the three new ones were bad out of the box. Not good odds.






Guess it pays to collect good parts over the last 40 years for my trucks. Never have I had to buy new replacement regulators, Ignition modules or alternators,Starters etc. :clap :clap
My truck is younger than me.
66 W100. 70 D 500 with 69 Hiab Speed Loader. 96 Ram 3500 Club Cab Cummin's 5 spd. 97 Ram 1500 Club Cab 5.9 gas auto. 83 W200 L/B 360 auto on propane.
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Re: Ammeter pegged 68 D-200

Postby powerwagon54 » Wed May 31, 2017 7:24 pm

Agreed Kim, that is why I save all the electrical including switches. The aftermarket is junk.
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