panhead gen help!!
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Stage I
Joined: Mar 2010
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panhead gen help!!
Ok guys, got a 49 pan ol school chop last fall. After about 500 miles the ignition switch burnt up. I replaced and wired in a new switch as well as new wires to the voltage reg. My bike is ussing a VW type voltage reg. After hooking it up, polorizing the gen and firing it up, i have issues! At just above idle, the lights will brighten a bit, but if you rev it, the voltage seems to go crazy and the headlight will start blinking and such. If i put a vlot meter on the battery, it will go crazy and move from anywhere from 6 v-16v, just crazy, jumping all over the place. So, i thought this must be the reg, so i bought another rer and placed a new battery in it, and the same thing happened??? I have the B+ hooked to the battery, the dF hooked to F of the gen, and D+ goes to A on the gen. Thats how it was originally hooked up and it seemed fine for awhile. I wouldnt think the gen is bad as it seems to charge at just above idle.
Please any help would be appriciated, also to polorize, jumping from the battery to what side of the gen should i jump it too? (making sure im right) Thanks a bunch!!
Please any help would be appriciated, also to polorize, jumping from the battery to what side of the gen should i jump it too? (making sure im right) Thanks a bunch!!
Road Warrior
Joined: Dec 2007
Posts: 1,854
Likes: 20
From: Eagle River WI
Is this charging system 6 volts ? must be because alot of guys were using the VW gens back then I would convert to 12 volts and use an aftermarket 12 volt gen plus a Delco-Remy or Accel volt reg If this has a stock gen have someone check it and go to the Delco or Accel system If you need part numbers let us know
I can only tell you about 6 volt 3 brush system ..The 3rd brush being able to move back and forth to vary the voltage but still uses a regulator
Advanced
Joined: Jul 2006
Posts: 80
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Did you polarize your generator after installing new battery? Momentarily touch a wire across Gen. Terminal( armature post) and the Battery terminal you should get a small spark. Restart bike an check output again. Polarize with bike not running.
Seasoned HDF Member
Joined: Oct 2005
Posts: 7,495
Likes: 3,705
From: Santa Klaus County, Cali
Couple of thoughts on this...
"Charging rate goes crazy" (fully charged battery + high charging rate)... means regulator is failing to reduce output as it should. Problem is in either faulty regulator or generator.
To determine if regulator is at fault - disconnect F terminal lead at regulator to open generator field circuit. If charge rate drops to zero, trouble has been isolated to regulator. If charging rate continues, generator field circuit is grounded internally or in wiring harness.
So questions for you. What caused the switch to burn out in the first place? Any chance that it also affected your generator? Are you sure you have the switch wired correctly?
To do the test on the bike are you connecting the ammeter between the battery positive terminal and regulator terminal marked "BAT"
"Charging rate goes crazy" (fully charged battery + high charging rate)... means regulator is failing to reduce output as it should. Problem is in either faulty regulator or generator.
To determine if regulator is at fault - disconnect F terminal lead at regulator to open generator field circuit. If charge rate drops to zero, trouble has been isolated to regulator. If charging rate continues, generator field circuit is grounded internally or in wiring harness.
So questions for you. What caused the switch to burn out in the first place? Any chance that it also affected your generator? Are you sure you have the switch wired correctly?
To do the test on the bike are you connecting the ammeter between the battery positive terminal and regulator terminal marked "BAT"
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