 Generator light on, What triggers this? |
|
|
|
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. |
|
|
| Flyinlow |
 Mar 12 2026, 05:51 PM
Post
#1
|
|
Flyinlow  Group: Members Posts: 127 Joined: 17-October 20 From: British Columbia, Canada Member No.: 24,774 Region Association: Canada 
 |
Hi.. what would be a reason why my generator light stays on when running?1974 2.0 T.I.A. Dennis
|
   |
 
|
  |
Replies(1 - 5)
| emerygt350 |
Mar 12 2026, 06:31 PM
Post
#2
|
|
Advanced Member Group: Members Posts: 3,475 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Could be as simple as a slipping belt or failed voltage regulator. Or more complicated, bad wires and ground issues with the alternator or failed alternator.
|
|
|
|
| Flyinlow |
Mar 12 2026, 06:58 PM
Post
#3
|
|
Flyinlow Group: Members Posts: 127 Joined: 17-October 20 From: British Columbia, Canada Member No.: 24,774 Region Association: Canada
|
Thanks I’ll keep checking. Dennis
|
|
|
|
| Dave_Darling |
Mar 13 2026, 12:20 AM
Post
#4
|
|
914 Idiot Group: Members Posts: 15,328 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
|
If the tach also doesn't read, it's fuse #8.
--DD |
|
|
|
| Flyinlow |
Mar 13 2026, 07:44 AM
Post
#5
|
|
Flyinlow Group: Members Posts: 127 Joined: 17-October 20 From: British Columbia, Canada Member No.: 24,774 Region Association: Canada
|
QUOTE(Dave_Darling @ Mar 12 2026, 11:20 PM)  If the tach also doesn't read, it's fuse #8. --DD Tach is fine… thanks for your reply |
|
|
|
| Spoke |
Mar 13 2026, 11:46 AM
Post
#6
|
|
Jerry Group: Members Posts: 7,353 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
|
QUOTE(Flyinlow @ Mar 12 2026, 07:51 PM) Hi.. what would be a reason why my generator light stays on when running?1974 2.0 T.I.A. Dennis Did this just start happening? Is the belt on and tight? With the engine running, measure all 3 wires for the alternator at the relay board connector to chassis ground. This will tell a lot of what is going on. D+ should be 14V DF should vary between 4-9V D- should be zero Vbattery should be 14V |
|
|
|
|
5 User(s) are reading this topic (5 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 13th March 2026 - 02:56 PM |
Invision Power Board
v9.1.4 © 2026 IPS, Inc.