 Voltage regulator ?, installed new |
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| jrblackbox |
 Nov 5 2019, 04:25 PM
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#1
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Member  Group: Members Posts: 285 Joined: 8-September 15 From: Easton, CT Member No.: 19,140 Region Association: None 
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The alternator (red) light would blink faintly when using the turn signals, I researched here and figured it was the voltage regulator. I ordered a new one (Beru) and received it today. It is quite smaller than the Bosch, it doesn't seem to sit properly in the plug and the 2 screwholes don't line up perfectly. tried it anyway the car a 71, started right up as usual, but the alt light is still blinking faintly, no change. what now? TIA for any advice.
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| Tbrown4x4 |
Nov 5 2019, 04:46 PM
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#2
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Senior Member Group: Members Posts: 707 Joined: 13-May 14 From: Port Orchard, WA Member No.: 17,338 Region Association: None
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Is the belt tight? Alternator brushes could be worn.
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| jrblackbox |
Nov 5 2019, 04:56 PM
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#3
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Member Group: Members Posts: 285 Joined: 8-September 15 From: Easton, CT Member No.: 19,140 Region Association: None
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QUOTE(Tbrown4x4 @ Nov 5 2019, 03:46 PM)  Is the belt tight? Alternator brushes could be worn. Belt is tight. |
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| Tbrown4x4 |
Nov 5 2019, 07:29 PM
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#4
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Senior Member Group: Members Posts: 707 Joined: 13-May 14 From: Port Orchard, WA Member No.: 17,338 Region Association: None
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Well, you really can't test much on the back of the alternator because of the cover, but check that the B+ wire from the alternator to the starter motor terminal is attached. (The same terminal where the battery cable goes.)
Also, maybe check continuity across the relay board connections where the alt harness plugs in to where the regulator plugs in. Other than that, you might just need to pull the alternator and have it checked. |
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| FlacaProductions |
Nov 5 2019, 09:14 PM
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#5
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Senior Member Group: Members Posts: 1,966 Joined: 24-November 17 From: LA Member No.: 21,628 Region Association: Southern California
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If you're still looking for a voltage regulator that fits correctly, George/AA just posted this: http://www.914world.com/bbs2/index.php?sho...=341528&hl=
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| Spoke |
Nov 6 2019, 06:56 AM
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#6
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Jerry Group: Members Posts: 7,185 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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QUOTE(jrblackbox @ Nov 5 2019, 05:25 PM) I ordered a new one...no change. what now? TIA for any advice. Sounds like the issue is not the VR. Mechanicals seem in order (belt). Time to break out the voltmeter. Take 4 voltage measurements all referenced to a chassis stud (Not the engine): D+ DF D- B+ D+, DF, D- can be found on the alternator connector at the relay board. Jam the voltmeter probe into the connector. Do not disconnect anything. B+ is the battery + terminal. All easily accessible. Should take less than a minute to do all 4 measurements. The difference in voltage between D+ and B+ is the voltage lighting the GEN light. Do the measurements with these conditions after the engine is warmed up: 1) Idle w/all electrics off 2) Idle w/Headlights on 3) 2k RPM w/all electrics off 4) 2k RPM w/Headlights on These voltage "sets" will give a good indication of the health of your charging system. Should take about 5 minutes to do all the measurements. Write them down as you take the measurements. Attached thumbnail(s) 
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| bdstone914 |
Nov 6 2019, 06:57 AM
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#7
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bdstone914 Group: Members Posts: 5,031 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE The alternator (red) light would blink faintly when using the turn signals, I researched here and figured it was the voltage regulator. I ordered a new one (Beru) and received it today. It is quite smaller than the Bosch, it doesn't seem to sit properly in the plug and the 2 screwholes don't line up perfectly. tried it anyway the car a 71, started right up as usual, but the alt light is still blinking faintly, no change. what now? TIA for any advice. Pull the alternator harness plug at the relay board and inspect the connections. Look into the socket ang for burnt wires. Probsbly not the regulator. |
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| 914Sixer |
Nov 6 2019, 11:23 AM
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#8
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914 Guru Group: Members Posts: 9,188 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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Many articles about the replacement VR, no matter who makes the solid state one.
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| jrblackbox |
Nov 6 2019, 04:27 PM
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#9
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Member Group: Members Posts: 285 Joined: 8-September 15 From: Easton, CT Member No.: 19,140 Region Association: None
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QUOTE(bdstone914 @ Nov 6 2019, 05:57 AM) QUOTE The alternator (red) light would blink faintly when using the turn signals, I researched here and figured it was the voltage regulator. I ordered a new one (Beru) and received it today. It is quite smaller than the Bosch, it doesn't seem to sit properly in the plug and the 2 screwholes don't line up perfectly. tried it anyway the car a 71, started right up as usual, but the alt light is still blinking faintly, no change. what now? TIA for any advice. Pull the alternator harness plug at the relay board and inspect the connections. Look into the socket ang for burnt wires. Probsbly not the regulator. Pulled the alternator plug at the relay board, looked solid nothing appeared to be burnt. Cleaned off the terminals plugged back in and no improvement. |
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