The alternator replacement thread, Fixed! |
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The alternator replacement thread, Fixed! |
VaccaRabite |
Aug 12 2018, 07:07 PM
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#1
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En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Waiting on the side of the road for a flatbed to take me home.
Engine ran great. Charging system not so much. Driving along. Lights started going dim. Car started bucking. Only 5 miles to home but it wasn’t going to make it, and no shoulders to pull over safe on the little farm roads. So I pulled into a spot I knew of and shut it down and parked it and now I wait. McMark had said earlier he wasn’t sure about the charging system. But the alt light was not on and no issues before now. So. What’s the alternator I need to buy? Maybe a new VR as well? I guess I should test the battery and make sure it’s okay too. Zach |
VaccaRabite |
Sep 8 2018, 03:06 PM
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#2
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En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
I’m back to grounds.
And I’m going to put a new battery in my multimeter, as it’s lying to me somehow on Ohms. It’s gotta be. Just did the DF shorted to D+ test, measuring voltage from D- to chassis. I picked 2 spots to measure. Both showed a voltage of (drumroll please...) 1.6 volts. Yesterday, and today, I was showing zero resistance between any points on the car. But I have a voltage drop of about 1.7 volts. It danced around a little bit settled between 1.6 and 1.7. Something is resisting somewhere. This would also probably match with the voltage difference in seeing when I measure the battery and what the ECU says it’s seeing on my testing laptop, as the ECU is seeing less. Another curious note. The red Gen light comes on at key in, goes off when the engine starts, and stays off when I pull the VR out of its slot. Should it do that, or should it light up again to alert me that something is not charging? Zach Attached thumbnail(s) |
Spoke |
Sep 8 2018, 04:13 PM
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#3
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Jerry Group: Members Posts: 6,991 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
I’m back to grounds. And I’m going to put a new battery in my multimeter, as it’s lying to me somehow on Ohms. It’s gotta be. Just did the DF shorted to D+ test, measuring voltage from D- to chassis. I picked 2 spots to measure. Both showed a voltage of (drumroll please...) 1.6 volts. Yesterday, and today, I was showing zero resistance between any points on the car. But I have a voltage drop of about 1.7 volts. It danced around a little bit settled between 1.6 and 1.7. Something is resisting somewhere. This would also probably match with the voltage difference in seeing when I measure the battery and what the ECU says it’s seeing on my testing laptop, as the ECU is seeing less. Another curious note. The red Gen light comes on at key in, goes off when the engine starts, and stays off when I pull the VR out of its slot. Should it do that, or should it light up again to alert me that something is not charging? Zach The GEN light staying off when the VR is out is expected. The 2nd set of diodes in the alternator generates a voltage equal to the battery voltage. About the 1.6V, try running a wire from the generator body to the engine case. |
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