The alternator replacement thread, Fixed! |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
The alternator replacement thread, Fixed! |
VaccaRabite |
Aug 12 2018, 07:07 PM
Post
#1
|
En Garde! Group: Admin Posts: 13,444 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 |
jarodswordmaster |
Sep 7 2018, 09:26 PM
Post
#2
|
Newbie Group: Members Posts: 8 Joined: 31-August 18 From: Ignacio Member No.: 22,447 Region Association: Southwest Region |
I can't get any charge out of my alternator with any of the tests so I"m assuming the alternator needs to be replaced.
|
Spoke |
Sep 7 2018, 09:58 PM
Post
#3
|
Jerry Group: Members Posts: 6,978 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
|
jarodswordmaster |
Sep 8 2018, 08:41 AM
Post
#4
|
Newbie Group: Members Posts: 8 Joined: 31-August 18 From: Ignacio Member No.: 22,447 Region Association: Southwest Region |
I can't get any charge out of my alternator with any of the tests so I"m assuming the alternator needs to be replaced. Is the GEN light on when the engine is running? What voltage do you read on the battery with DF shorted to D+? Yes, the gen light is on when the engine is running, same volts running and not running, 12.6. when I short DF to D+ I get no change in the voltage. I'll run through all the tests again today. I short DF to D+ with all connections still made between the alternator, relay board and VR correct? |
Spoke |
Sep 8 2018, 08:48 AM
Post
#5
|
Jerry Group: Members Posts: 6,978 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
I can't get any charge out of my alternator with any of the tests so I"m assuming the alternator needs to be replaced. Is the GEN light on when the engine is running? What voltage do you read on the battery with DF shorted to D+? Yes, the gen light is on when the engine is running, same volts running and not running, 12.6. when I short DF to D+ I get no change in the voltage. I'll run through all the tests again today. I short DF to D+ with all connections still made between the alternator, relay board and VR correct? Remove the VR then short D+ to DF. Measure the voltage from DF/D+ to chassis. Should be the same as the battery voltage. If not, the alternator is suspect. When did this change from working correctly to not working correctly? Did you check the alternator belt for tightness? |
jarodswordmaster |
Sep 8 2018, 08:59 AM
Post
#6
|
Newbie Group: Members Posts: 8 Joined: 31-August 18 From: Ignacio Member No.: 22,447 Region Association: Southwest Region |
I can't get any charge out of my alternator with any of the tests so I"m assuming the alternator needs to be replaced. Is the GEN light on when the engine is running? What voltage do you read on the battery with DF shorted to D+? Yes, the gen light is on when the engine is running, same volts running and not running, 12.6. when I short DF to D+ I get no change in the voltage. I'll run through all the tests again today. I short DF to D+ with all connections still made between the alternator, relay board and VR correct? Remove the VR then short D+ to DF. Measure the voltage from DF/D+ to chassis. Should be the same as the battery voltage. If not, the alternator is suspect. When did this change from working correctly to not working correctly? Did you check the alternator belt for tightness? my son and i are working on reassmbling a rust bucket that everything had been gutted except for the wiring harness to strip for painting. So, this alternator hasn't been proven out to get good yet. I don't recall if it was the one I had on this engine 4 years ago when I pulled it from the 72 we sold. It's all a blurr now as to what I swapped when I put the 1.7l back in the 72 and sold it. I kept the 2.0l and side shifter for the 76 it belongs to that we are working on now. I'm pretty sure I have the circuit complete for charging. Just want to make sure before spending money on the wrong part. |
Lo-Fi Version | Time is now: 17th May 2024 - 09:08 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |