Enduralast Alternator System Wiring Addendum:
For 1974-76 R90/6 and R90S.
My Bikes: 1974 R90/6, 1975 R90S, 1976 R90S.
My Bikes: 1974 R90/6, 1975 R90S, 1976 R90S.
1. Diode Board on a ‘75 R90S
• Diode board has two (2) red positive (+) wires going to: 1) starter solenoid, and 2) starter relay.
• Red wire to starter solenoid is discarded with diode board. Red wire to starter relay will be cut at diode board, and later re-connected to starter solenoid (+) post.
2. Starter Relay, ‘75 R90S
• Stock wiring: from starter relay - red & blue go to diode board, black goes to starter solenoid trigger terminal.
• No “white plug” on older /6 models; blue and black wire are connected to the starter relay.
- Black wire goes to starter solenoid.
- Red wire was attached to diode board. Ring terminal has been attached to end, will be reconnected to starter positive post.
- Blue wire was connected to diode board, will be reconnected to white wire from Enduralast Regulator
4. Red wire from starter relay, was attached at diode board
- Removed female spade terminal
- Attached ring terminal
- Reconnected to starter solenoid positive (+) post
5. Stock Wiring Sketch
• Stock configuration diagram oversimplified to show only wiring altered in installation
• DB - diode board
• SR - starter relay
• SS - starter solenoid
• VR - voltage regulator
6. Alterations to stock wiring
• DB - diode board
• SS - starter solenoid
• SR - starter relay
• VR - voltage regulator
• Blue wire from SR is cut at DB, will be re-connected to white wire on Enduralast Regulator
• Red wire from SR is cut at DB, install ring terminal an connect to SS positive (+) post
Discard old DB and old VR and discard old red wire from DB to SS, as per Enduralast instructions
• Blue wire from SR is connected to ERR white wire
• Red wire from SR is connected to SS positive (+) post
• Black wire from SR is reconnected to SS trigger terminal
• All other wiring is connected following Enduralast instructions:
• Red wires from ERR are connected to battery (+) post or to SS (+) post
• Yellow wires from ERR are connected to Enduralast Stator yellow wires
• Black wire from ERR is connected to (+) with key ON, such as coil, as per Enduralast instructions
8. Photos below show the red wire from ERR passed through grommet with positive (+) battery cable, and is connected to the starter (+) post.
8. Photos below show the red wire from ERR passed through grommet with positive (+) battery cable, and is connected to the starter (+) post.
- new battery cables from Euro Motoelectrics (EME).
- new starter from EME
- red wire from ERR is connected to the (+) battery post, or in my case to the (+) post on the starter
- my ERR is mounted in the stock voltage regulator location, red wire to starter (+) post is short length.
9. The Enduralast Alternator
This post was absolute gold for me. I was trying to follow the regular Enduralast instructions, and floundered when I got to the "white plug" issue on my 1976 R90. I went ahead and wired it up in a way a sense to me, then decided to do some googling to see if anyone else had run into the same issue before I reconnected the battery. I found your page, turns out I had not wired it correctly, thank goodness I found your page. Thanks for posting this!
ReplyDeleteGlad it was helpful.
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