2007 Escape Intermittent Charging Issues
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2007 Escape Intermittent Charging Issues
I'm working on a 2007 Escape 3.0l with 278k miles. The battery light comes on intermittently. I replaced the battery. Same issue. Took the alternator off, had it tested. First test was bad. Bought new alternator, installed it. Immediately charged 17.5 volts. Returned the alternator, had it tested. Tested good. Asked to have the old alternator tested again. It tested good. Installed the old alternator and everything was fine for several hours. Eventually, the battery light came back on again. Shut the car off for a minute or two, restarted it and everything was fine for a little while. Same thing, battery light comes on, shut it off, restart, fine for a while. I tested all the wires to and from the alternator, all test good, even when battery light is on. I don't have access to an oscilloscope or to a multimeter with duty setting. I was hoping that someone has ran into the same thing and found out exactly what it is. I don't want to just throw parts at it. Thank you for your time and consideration in this matter.
Hotshot
Joined: Jan 2004
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From: St Louis
Sounds like two bad alternators. The first (original) probably has bad brushes, the second is probably a bad regulator.
Tip: ALWAYS have a replacement alternator off the shelf at the parts store tested before you pay for it. Replacing the alternator on a 3.0 Escape is a colossal pain in the A$$.
Note: This is a PCM-controlled alternator. It's always possible that there is an issue that is not internal to the alternator.
Tip: ALWAYS have a replacement alternator off the shelf at the parts store tested before you pay for it. Replacing the alternator on a 3.0 Escape is a colossal pain in the A$$.
Note: This is a PCM-controlled alternator. It's always possible that there is an issue that is not internal to the alternator.
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So I figured it out, I tested continuity of the b+, b+ signal wires, gencom, and genmon wires for continuity. Tested good, no breaks. Tested them for continuity to ground, not shorting to ground. Tested them for voltage, had voltage. Test gencom and genmon for duty, no duty. Tested the gencom for voltage and it was too low. Bad computer.
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