So here is my problem. Since Ive gotten my D it seems that the altenator is just plain weak. If I have the radio on and headlights my interior lights dim. I open the doors and lights dim. I can see the lights dim if I have a blinker on or press the brakes.
So! Before I upgrade my deck, and add two 12's in the back I was thinking I should upgrade my Alt a bit.
Ive had my charging system checked when running it sits at 14.1. I turn the lights on, and the radio at a normal vol it hits 13.5. The one on my D now is a 90amp.
I have found a place that has a 200amp. I think that would be enough as long as I up grade the wires to the battery.
What do you guys think?

 

136 should do you fine. An aftermarket 200 is nice but likely too much for your old system. The 136 was standard for the tow package.

IndyDurango

 

Yeah the 136 should be fine. I can run my 1800 watt audio system, fog lights, pair off 55w driving lights, highbeams, fan on high with the rear window defroster on without any power supply issues with my factory 136. If that isn't enough of a load I don't know what is.......

 

Just because you have voltage doesn't mean you have appropriate amperage being distilled. Replace the alternator with the larger 136 Amp and be done with it. If you need more amps then go with the 200.

 

136 is standard for the tow package? I wonder why mine is a 90...
Must of been replaced with the wrong one.
I'll get a 136amp and see what happens.
adukart: what system are you running?

 

Roller, have you checked the battery? A weak battery will cause your exact issue. Think of the battery as your a buffer for electrical loads. It charges during low current demands and expends energy as needed. If the battery is weak it causes fluctuations in voltage and inversely amperage to your electrical loads. By all means if you plan on getting a system you will want a higher amperage output. You also want to look for poor connections and corrosion between the alternator and the battery.

A little food for though, semis typically run 110 amp alternators without a problem.

 

Perhaps maybe this will work better???




Holy Altenator!

 

That might be able to keep up.

 

Holy altenators batman!
yea I got my batt checked and the charging system. They thought the alt was just to weak. Thing is it looks new compared to alot of the engine. Ill throw in a 136 and see how that works though.

 

If you want to put a good load on the battery pull the coil wire and crank the engine for 30 seconds. Using a meter if it drops below 9.6 volts while cranking replace the battery. Or if you have a pile of cash go buy a carbon pile