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Originally Posted by zafarhayatkhan
Car: 94 E320
A few days back, ASR/Check Engine lights started coming on intermitently. Then the car failed to start, clicking noise. Replace battery. Everything was good for a few days.
Then the car failed to start again. Jump started, had the battery and alternater check at Advance Auto Parts: both good. Drove around, came back, started fine. In the morning, the car failed to start again.
Ordered a voltage regulater from Phil Today.
What is the most likely source for drain?
This morning heard the AC blower with the key on, PBU was in the off position. The sound was very faint, so not sure.
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Luckily you have a voltage regulator coming, unfortunately this is also the likely problem. If your output voltage is 0 or very small, likely caused by a worn Volt reg, you are draining the car as you drive/use it. If the Volt regulator has gone bad, they are usually on/off, and you should not see any alternator charging with a spent reg.
All the electrical irregularities will probalbly go away, once the charge system is fixed and working normally.
In my experience, my volt reg went while driving during the afternoon, so I didn't notice it at first, no factory Volt meter in my 87300TD. So anyhow it starts getting dark and I flip on the headlights. Within about a minute, my abs light, check engine...all dash lights, come on the radio starts turning on and off, I mean it was wierd. Checked the output voltage and zero, pulled the volt reg and found the problem. replaced with new and she's back to normal in every respect. Now I have one less ashtray and a Volt, Boost and EGT gauges in its place.