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Unread 03-15-2015, 09:20 PM   #1
Not Yet Wild
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Default Key Switch Voltage

I've been slow working on my 1996 DS as time permits. This weekend I installed new Trojan 875 batteries. I started to install a reducer and found that my voltage at the key switch is only 25.6v. Pack voltage after sitting overnight is 51.3v. Shouldn't I have the same voltage at the switch as the pack or am I wrong.
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Unread 03-15-2015, 09:37 PM   #2
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Default Re: Key Switch Voltage

Let me guess here your reading across the terminals on the switch, with the switch in the off position
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Unread 03-15-2015, 09:41 PM   #3
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Default Re: Key Switch Voltage

To answer your question yes, a small drop is expected depending upon the quality & condition of the switch.
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Unread 03-15-2015, 10:18 PM   #4
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Default Re: Key Switch Voltage

This reading is not across the switch. Ground to off and then on. Both readings the same, 25 volts. Will this cause a problem activating the reducer.

More important, is this hurting the performance and reliability of the cart. Everything is original, never touched.
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Unread 03-15-2015, 10:31 PM   #5
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Default Re: Key Switch Voltage

The green wire (hot side of key switch +48v) comes from the same big solenoid post that the pack positive connects to.

Make sure You don't accidentally have that wire on the other big post across from the pre-charge resistor (controller B+ side).
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Unread 03-15-2015, 10:43 PM   #6
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Default Re: Key Switch Voltage

I'll look at the sticky wiring diagram. I upgraded to 4ga. cables and made sure to label everything so I could put everything back correctly. Could have messed up there. But I should have around 48v at the switch, correct.
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Unread 03-15-2015, 11:04 PM   #7
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Default Re: Key Switch Voltage

You said (ground) that should be negative.
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Unread 03-16-2015, 06:54 AM   #8
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Default Re: Key Switch Voltage

Quote:
Originally Posted by Grizz3500 View Post
I'll look at the sticky wiring diagram. I upgraded to 4ga. cables and made sure to label everything so I could put everything back correctly. Could have messed up there. But I should have around 48v at the switch, correct.
You should be within 0.1v of pack voltage at the key switch.

Here is a better version of the wiring diagram:

http://www.buggiesgonewild.com/attac...car_ds_48v.jpg
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Unread 03-16-2015, 08:52 PM   #9
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Default Re: Key Switch Voltage

Thanks for the voltage info Sergio. That diagram is much easier to read. Hopefully I just missed something or have a bad wire/connection.
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