Voltage regulater problem
Thread Starter
Mopar Fan
Joined: Apr 2013
Posts: 65
Likes: 0
From: Pendleton Indiana
Voltage regulater problem
Ive been having voltage problems with the regulator not doing its job right. Ive replaced all the bad wires and non are burned. with my facotry voltage regulator it runs just fine with my volts occasionally going up to 15. I put a new voltage regulator on from autozone and my volts will not go past 11 no matter what rpm im at. Put the old regulator back on and it will work almost exactly like it should. Any Ideas on this?
Mopar Lover
Joined: Nov 2012
Posts: 1,846
Likes: 140
first check if the batt will take a charge from reg charger that is powered from a wall out let. with no connection to any car wiring. I.E. is the batt bad? how old is the batt? if over 4 years old i would blame the batt. and check the regulator grounding. and the engine to frame grounding. did you do an engine removal lately?
Mopar Lover
Joined: Nov 2007
Posts: 2,424
Likes: 248
Seems to me if you put a new regulator on it and it runs at 11 "all the time" you've answered you question..............the new one is defective. Remember.........new does not mean good or functional. it just means you paid money for something different than what you had.
Some things to keep in mind
Make absolutely certain the regulator is grounded Not being grounded however usually causes over charging
Make absolutely certain the regulator connector is making contact. I believe you can buy the regulator connctor from NAPA but they are expensive (We are talking about a 70 / later Mopar, right?)
Also what will cause OVER voltage (over charging) is LOW voltage to the ignition / regulator. Voltage supplied to the regulator / ignition / alternator field comes from the ignition switch "run" voltage. To check this, tap into the "run" voltage with a voltmeter and hook one meter probe to that and the other probe to the batter positive post. Turn the key to "run" but with the engine not running. You are hoping to read a very low voltage, the lower the better. If you read more than a couple of tenths of one volt, you have voltage drop in the ignition harness
Likewise, poor ground path between the battery NEG post and the regulator mount will cause over charging.
These voltages drops will ADD to the regulator "set point."
Some things to keep in mind
Make absolutely certain the regulator is grounded Not being grounded however usually causes over charging
Make absolutely certain the regulator connector is making contact. I believe you can buy the regulator connctor from NAPA but they are expensive (We are talking about a 70 / later Mopar, right?)
Also what will cause OVER voltage (over charging) is LOW voltage to the ignition / regulator. Voltage supplied to the regulator / ignition / alternator field comes from the ignition switch "run" voltage. To check this, tap into the "run" voltage with a voltmeter and hook one meter probe to that and the other probe to the batter positive post. Turn the key to "run" but with the engine not running. You are hoping to read a very low voltage, the lower the better. If you read more than a couple of tenths of one volt, you have voltage drop in the ignition harness
Likewise, poor ground path between the battery NEG post and the regulator mount will cause over charging.
These voltages drops will ADD to the regulator "set point."
Thread
Thread Starter
Forum
Replies
Last Post
