Create your own blog: viewtopic.php?f=7&t=17487

Voltage swings

Electrical issues
Forum rules
Please do not start new topics here, but here: New Panhead and Flathead topics
Post Reply
erlyirn

Voltage swings

#1

Post by erlyirn » Sun Feb 24, 2008 9:16 am

32 E solid state cut out and a year old battery. kept battery in the house and charged up over the winter,stayed at about 6.2 volts all winter. Put it in the bike and after about 10 kicks fired up,warmed it up and took a 50 mile ride. I noticed the dash lights seemed dim so checked voltage at the switch and battery and was at 4.5. Flipped switch a couple of times and jumped up to 5.9. Gen is putting out 7.2 and at the relay it is 6.8 yet when turn on switch it may or may not have right volts. Changed switch and same thing. Went through and pulled wires while switching and same thing,sometimes volts were good and sometime not. Sometimes if I worked the the brake switch the volts would come back up.The battery always charges up in about 15 min after leaving switch on to check things. Could this be as simple as a bad battery or should I be looking at something else.



john HD
Moderator
Posts: 3674
Joined: Sat Aug 20, 2005 7:24 pm
Bikes: '42 WLA X 2, '55FL, '93 Ultra Classic, '91 Fatboy, '97 883, '71 Suzuki Duster 125, '83 GPz 750.

#2

Post by john HD » Sun Feb 24, 2008 1:32 pm

if the battery charges good and shows similar readings with a hydrometer i would suspect your key switch next.

i have a whole pile of crappy aftermarket ones that are junk and do as you describle. i finally got a good one using a mix of stock and repro parts that works reliably.

don't forget to lubricate the switch!

i find it odd you are seeing a difference across the relay as you stated, it too may be partly at fault.

john

Robert Luland
Posts: 893
Joined: Sun Sep 02, 2007 7:56 pm
Bikes: 1922JD, 1937 ULH, 1946FL 1948FL, 1957FL, 1960FLH, 1965XLCH, 1995 FLHT
Location: Hoboken, NJ
Contact:

#3

Post by Robert Luland » Sun Feb 24, 2008 1:59 pm

That brake switch could be of concern. You might want to ohm it out. Instead of driving yourself nuts. Yank everything off the switch except for ignition. Fire it up and see what you got and then one by one start looking for your gremlin. Sounds to me like something is grounding. Bob

erlyirn

#4

Post by erlyirn » Mon Feb 25, 2008 7:49 am

I checked the battery again and even though it charges up to 6.2 the hydro test shows a weak cell so I am going to get a new battery before I proceed. I did pull the wires and 1 by 1 hooked them back up and the only one that dropped bad was to the coil but when I turned the motor over and the points opened it came back up.

I don't like to do wiring all that much so when I was rebuilding the bike soldered all the terminals then heat shrinked them and ran everything through looms so as not to pinch any wires. I haven't blown any fuses yet but this charging stuff drives me crazy. Thanks

Cotten
Posts: 6911
Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois

#5

Post by Cotten » Mon Feb 25, 2008 2:36 pm

Erlyirn!

Please remember that the 32Evil system is designed to discharge at highway speeds.

....Cotten

ozwick86
Posts: 757
Joined: Sat Jul 17, 2004 4:06 am
Bikes: '59 Pan FLHF
Location: N. California

Voltage swings

#6

Post by ozwick86 » Mon Feb 25, 2008 3:46 pm

erlyirn,

Watch out where you buy your 6volt battery as they are all crap!.

I think 45 Parts Depot has a good one that won't fail on you.


http://flatlandmotorcyclecompany.com/intro/

erlyirn

#7

Post by erlyirn » Mon Feb 25, 2008 9:26 pm

After a couple of days of reading past posts the reoccurring theme is the poor quality of available electronics. This has been a good gen for me only needing a cleaning once in a while. So I don't want to do any whole sale changes until it just totally pukes. Thanks

john HD
Moderator
Posts: 3674
Joined: Sat Aug 20, 2005 7:24 pm
Bikes: '42 WLA X 2, '55FL, '93 Ultra Classic, '91 Fatboy, '97 883, '71 Suzuki Duster 125, '83 GPz 750.

#8

Post by john HD » Tue Feb 26, 2008 12:32 am

Cotten wrote:Erlyirn!

Please remember that the 32Evil system is designed to discharge at highway speeds.

....Cotten
that is why you need to convert it to 2 brush and make a frankenstien Jr. regulator.

no one will be the wiser!

john

Post Reply

Return to “Electrical”