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75 DT250 Battery Connections

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75 DT250 Battery Connections was created by Kip

G'Day to all. Just finishing up on my 75 DT250 and one of the last things is I need to reinstate the battery. I was luck enough to find a new one to spec but it's been so long since I had a battery in it.

New battery has a female positive which is straight forward. The negative or ground connections is what I'm wondering about. The batter came with a female bullet connector. There is a single female bullet connector (black) which leads into the harness so assume it is negative (gound). Is this where the battery ground connects to?

One last question. There is a double female bullet connector which the tail light gorund is connected into. The negative wire from this goes directly into the harness. Should there be a second ground from the remaing female bullet connector and if so I can only assume it must go to the frame.

I've uploaded a couple of marked up pdf images which should provide the visual.

Appreaciate your assistance,

Kip
05 Mar 2021 13:59 #1

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Replied by Yamadude on topic 75 DT250 Battery Connections

Kip,
In this instance, your wiring diagram is your Best Friend.
I imagine that the Tech section has a service manual for your bike.

You have the advantage that your wiring loom seems to be basically unmolested.
You can just call me Dude.
Syracuse, New York
Current bikes: 1973 DT3, 1974 TY250, 1969 Triumph Bonneville, 1975 XS650, 1976 XS650, 1982 XS650, 1983 XS650, 2006 FJR1300
Last edit: 05 Mar 2021 15:45 by Yamadude.
05 Mar 2021 15:43 #2

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Replied by Yamadude on topic 75 DT250 Battery Connections

I'll add that aftermarket batteries sometimes come with connections that don't exactly fit with your bike connections. Sometimes you'll need to adapt the connections to what is needed.
You can just call me Dude.
Syracuse, New York
Current bikes: 1973 DT3, 1974 TY250, 1969 Triumph Bonneville, 1975 XS650, 1976 XS650, 1982 XS650, 1983 XS650, 2006 FJR1300
05 Mar 2021 15:48 #3

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Replied by Gr8uncleal on topic 75 DT250 Battery Connections

As previously advised, have a good look through the wiring diagram for your model. In the meantime, here are a couple of things to consider:-

1) More often than not, the ground lead from the battery will connect directly to the frame - my DT360A (1974) does this via a short length of wire with a ring connector on one end.
2) Have a close look at your "double" black female bullet connector - it might well be a triple, with the other entrance alongside the crimped connection. If it is, the three ports are for left and right rear indicators and the tail light.

 
06 Mar 2021 00:14 #4

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Replied by Kip on topic 75 DT250 Battery Connections

Gr8uincleal,

Thanks for your reply.

I do have that male bullet and ring connector wire left over and was wondering that. In the wiring schematic of the part manual shows it connecting into the harness.(attached).

In the parts manual for the rear signal lights it shows a ground wire with a ring and what appears to be a male bullet connector (parts 23 and 24) it shows this connecting in to signal light mount but don't recall this wire ever being there and if it was don't see where it would connect back into the harness. (attached)

Maybe a trial and error situation.

Cheers,
Kip
06 Mar 2021 09:41 #5

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Replied by MarkT on topic 75 DT250 Battery Connections

Kip, Signal ground wires connect to where you thought they did...  but as Alan said, likely there are two open sockets.

I'm fairly certain the negative battery just plugs in the harness on that model.  I have a DT250b out in storage (about 90 miles away) and I will try to get there and check this weekend.
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
06 Mar 2021 09:59 #6

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Replied by MarkT on topic 75 DT250 Battery Connections

I meant where Alan thought they did...  by the taillight ground.
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
06 Mar 2021 10:00 #7

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Replied by Gr8uncleal on topic 75 DT250 Battery Connections

MarkT wrote: I meant where Alan thought they did...  by the taillight ground.

Yes - three port female connector.

If your rear indicators are rubber mounted, like they originally were, they won't work without these ground leads. However, if the rubber mounts have been discarded and the indicators are bolted direct to the frame, then the grounds won't be needed.
06 Mar 2021 10:23 #8

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Replied by Kip on topic 75 DT250 Battery Connections

Thanks all, sorry for the late reply but have been busy with work for my paying job. I give it a go, bit of trial and error and see where I land.

Cheers,
Kip
Last edit: 16 Mar 2021 14:30 by Kip.
16 Mar 2021 14:30 #9

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