10-24-2021, 12:15 PM | #1 |
Getting Wild
Join Date: Feb 2020
Posts: 138
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Diode and Lithium
New 48v lithium install and a bit confused on the diode and if it’s still necessary, please advise |
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10-24-2021, 12:59 PM | #2 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,119
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Re: Diode and Lithium
Not much info here - it's really whether the controller has the diode internal but I would definitely go with the diode. Band goes toward positive on the solenoid small terminals. The other thing in that bag is the "precharge resistor" . You need to look at your controller specs to see if you need that.
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10-24-2021, 01:50 PM | #3 |
Bonafide Nincompoop
Join Date: Dec 2015
Location: Charlottesburg Va
Posts: 8,987
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Re: Diode and Lithium
Yes, you need the diode and the resistor.
Diode on the small terminals. Stripe towards the positive wire. Resistor on the large terminals. |
10-24-2021, 01:57 PM | #4 |
Getting Wild
Join Date: Feb 2020
Posts: 138
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Re: Diode and Lithium
Thank you guys, the older smaller sized solenoid did not have these and when I bought this new one it was an option that I purchased.
I got in a little over my head ripping things apart like always, electrical is one of my weakest parts so I am learning and going slow. |
10-24-2021, 09:36 PM | #5 |
Gone Wild
Join Date: Nov 2016
Location: near Calgary, AB, Canada
Posts: 1,510
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Re: Diode and Lithium
The manual for the Curtis 1234SE indicates that the controller has a selectable Precharge Feature built into it. If the precharge feature is turned on, according to the manual "Precharge provides a limited current charge of the controller’s internal capacitor bank before the main contactor is closed. This decreases the arcing that would otherwise occur when the contactor is closed with the capacitor bank discharged."
If the precharge feature is selected, I would "think" that an external precharge resistor mounted on the solenoid (main contactor) would NOT be required ... or to put it more strongly ... should NOT be installed. You might want to check with Curtis for their confirmation. In addition, the electrical diagram in the Curis 1234SE manual does NOT show an external precharge resistor (see manual attached). |
10-24-2021, 09:58 PM | #6 | |
Getting Wild
Join Date: Feb 2020
Posts: 138
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Re: Diode and Lithium
Quote:
The things that worries me the most is the actually harness that is in there seems like a bunch of modifications have been done to it, the old bucket harness that was in there is junk and is getting replaced with a new one for the light kit included with the new body change. I just wonder if I should consider a new factory harness rather than try and figure out this hacked together one. These projects seem to always start simple and turn into a total rebuild |
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10-25-2021, 07:33 AM | #7 |
Gone Wild
Join Date: Apr 2020
Location: Hurricane, Utah
Posts: 2,742
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Re: Diode and Lithium
A new harness is pretty cheap and it sounds like yu are working in that direction anyway. I think I would just make the jump now and go for it :)
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10-25-2021, 08:14 AM | #8 | |
Getting Wild
Join Date: Feb 2020
Posts: 138
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Re: Diode and Lithium
Quote:
https://www.revolutiongolfcars.com/wiring-harnesses |
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10-25-2021, 08:18 AM | #9 |
Gone Wild
Join Date: Apr 2020
Location: Hurricane, Utah
Posts: 2,742
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Re: Diode and Lithium
That is the place to be! Best is to give David a call directly; he will walk you through what you need and get you set up right the first time
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10-25-2021, 08:34 AM | #10 |
Bonafide Nincompoop
Join Date: Dec 2015
Location: Charlottesburg Va
Posts: 8,987
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Re: Diode and Lithium
Check with David, he might be able to get the right harness, but it also might be on back-order.
Did that controller have an adapter to plug into the cart harness? |
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