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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.

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Old 10-19-2021, 04:33 PM   #1
Not Yet Wild
Join Date: Jul 2020
Posts: 6
Unhappy Solid State Conversion blew the diode on the solenoid

I am started with a clean slate, no existing wiring, no motor, no solenoid, no accelerator/potentiometer...
Only thing from original cart is the key switch....

Used the CartsUnlimited Diagram from the BGW site.

Controller: Altrax SR48400
FnR Switch: Heavy duty EZGO
Accelerator: Curtis Type 0-k5 potentiometer/throttle pedal with 5 cables labeled POT High, POT Low, POT Wiper, Switch Output, Switch Common.
- I used POT High in J4, and POT wiper in J5. POT low was NOT used.
- SwOut went to FnR, SwCommon went to Solenoid + spade connector.

Solenoid: Curtis/Albright SW180-93 500Amp
--- documentation indicates :
- BOTH large top posts are positive (and connected by a capacitor)
- the top two spade connectors are positive
- the bottom two spade connectors are negative
- the right hand side of the spade connectors have a diode connecting the + and the -.
Wired in this manner, when I turned the key on everything seemed OK.
When I pushed the accelerator pedal the diode between the + and - spade connectors on the solenoid blew out violently.

I have double checked that I wired according to the diagram but obviously I have done something wrong.

Can anyone lend some expertise to help me figure this out?

Thank you.
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Old 10-19-2021, 05:11 PM   #2
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 4,111
Default Re: Solid State Conversion blew the diode on the solenoid

You probably had the diode in backwards. The Banded end has to go to the Plus on the solenoid.
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