[Roadsters] Electrical question
Gary McCormick
gkmcc at sbcglobal.net
Tue Oct 27 14:39:17 MDT 2020
Thanks, another good suggestion.
Gary McCormick
Sent from my iPhone
> On Oct 27, 2020, at 12:28 PM, Mark Miller via Datsun-roadsters <datsun-roadsters at autox.team.net> wrote:
>
> I concur and would start with the charging circuit: betting on a bad voltage regulator. And if you don't have a test light a meter set to current (mA DC) is a nice tool as well (especially if there is more than one problem).
>
> Regards,
>
> Mark Miller 707-490-5834
> markmiller at threeboysfarm.com
>
>> On 10/27/2020 11:00 AM, datsun-roadsters-request at autox.team.net wrote:
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>> Maybe a bit more difficult on a murdercicle but here's how I do it on a car. Charge the battery so it's at least 1/2 charged, then take the negative cable off the battery. Put a test light between the battery post and the cable end. If there is a drain, the light will light. Now start removing electrical things until the light goes out. (On a car I pull fuses one at a time.) When the light is out you know which circuit to tackle. That might be enough to get you started.
>>
>> Stan, who has 2 Yamahas under the deck; wife's DT125 and my DT250
>>
>> Not a roadster-specific question, but related to vintage vehicles (my '72 Yamaha): Any tips on tracking down the cause of a battery draining down near flat after a couple of days of sitting? New(ish) wet-cell battery, just topped up the acid this Friday, charged it up. On Saturday the bike started, ran fine (after I cleaned a couple of fouled spark plugs ? two-strokes, you gotta love 'em), but went to try it again this evening and it barely lights the neutral light.
>>
>> Gary McCormick
>> '70 Datsun Roadster
>> SRL311-13291
>> San Jose, CA[Roadsters] Electrical question
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