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6 to 12v conversion

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Old Nov 9th, 2019, 10:11   #1
arcturus
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Default 6 to 12v conversion

Hi again I have decided to bite the bullet and the conversion at the same time as rebuild. Sourcing a dynamo, regulator and blower motor. Ron,will contact you regarding the converter for wiper motor. Horn,I have a spare 12v. will I need to change the relay?
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Old Nov 9th, 2019, 14:49   #2
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Arcturus;

6V Relays should be changed when going to 12V, as they will likely overheat with double V applied. See also: https://www.sw-em.com/Ignition_Slave...us_duty_relays

...if you cannot locate a 12V Wiper Motor (first choice!), running the original 6V unit with a Dropping Resistor is always an option. I'm sure you've seen this, but here is the link again: https://www.sw-em.com/Vintage_Volvo_...conversion.htm

...there is even some of your 12V converter info posted there, but this is for low current loads up to 2A...I expect these modules would not have an adequate output for the Wiper Motor...you could make some current measurements to verify (and remember: Motor current increases with mechanical load).

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Last edited by Ron Kwas; Nov 9th, 2019 at 14:52. Reason: Additional info added
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Old Nov 9th, 2019, 17:15   #3
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Ron ,would the DR's shown be up to the job of running wiper motor. Changing to a 12v means taking off dash which requires in turn removal or wind shield.If so do you have any spare.Send PEM with details if you can oblige,or details of where they can be obtained.
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Old Nov 12th, 2019, 14:37   #4
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Managed to locate most of the stuff. I will need to stick to the original start motor as the 12v doesn't fit or so I have been informed. I hope it doesn't knacker the solenoid.
Ron,does the full current run that or is it like a relay,a switch?
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Old Nov 12th, 2019, 15:47   #5
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arcturus;

Preferred first option is always to replace 6V components with 12V, and many of these exist because later Volvo models also went to 12V. If you cannot locate, or have another reason for not changing to the 12V version, DRs are the second choice, and yes, one could be installed for the Wiper Motor (although removal from an Amazon does not require glass removal and is otherwise not unreasonable...I can't speak to level of difficulty removing Wiper Assy on 544).

For answers to other questions, I refer you back to the article and notes, including reports of first-hand experience.

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Old Nov 12th, 2019, 17:07   #6
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I have sourced all the components required including wiper motor. I have been informed that the 12V starter won't fit. not sure if I can swap a solenoid from a 12v. They look as though they are permanently attached. Would the 6v solenoid burn out? Is there a way round this?
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Old Nov 19th, 2019, 11:31   #7
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I've worked in bench electrical on starters, gens, alts, carbs, etc for a few years. It is possible to rewire a 6v to 12v. I don't know who or where you might get this done in your end of the planet. Call around to auto electric rebuild shops. Solenoid may not be the issue. Starter drive pinion may blow first.

I upgraded my 1950 Plymouth a long while back with good success. Used a resistor at the fuel gauge. Had to change lite bulb sockets front and rear. I didn't bother changing the instruments bulbs - just turned the dimmer rheostat to lowest setting, bulbs were still very bright. New 12v blower motor and generator/regulator. I left the starter alone at 6v. Spun the engine over very easily (and fast). Blew the started drive after a few years. Carried a spare 6v starter in the trunk just in case.
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Old Feb 13th, 2020, 21:20   #8
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Re' fuel gauge .Where exactly should the resister be fitted? Is it in the supply from fuse or from sender unit?It talks about fitting externally to the instrument panel. It's a bit unclear.
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Old Feb 13th, 2020, 23:54   #9
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Arcturus;

In series with Ign Power supply to Instrument, and external to Inst is fine (IOW, Inst does not need to be removed to add DR...you could simply add it externally, between supply [there are multiple wires as terminal is used as a common tiepoint] and Inst power terminal).
Like so:


See also: https://www.sw-em.com/Fuel%20Gauge%2...nstrument_data

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Old Feb 14th, 2020, 01:22   #10
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Quote:
Originally Posted by arcturus View Post
I have sourced all the components required including wiper motor. I have been informed that the 12V starter won't fit. not sure if I can swap a solenoid from a 12v. They look as though they are permanently attached. Would the 6v solenoid burn out? Is there a way round this?
Have you sourced a 12V dynamo? If not, consider a Dynamtor :

https://simonbbc.com/charging/dynamator/

It will give you an alternator output from a dynamo shaped component, retaining the original looks but giving you the output you need to keep everything charged.

Would i be right in thinking you're converting to negative earth as well?

To answer your question about the starter solenoid, i'd strongly advise changing it to a 12V solenoid, the starter motor you'll probably get away with but if you can find a 12V one that will fit, use it! Failing that, get yours converted to 12V ideally.
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