How many volts does the auto choke usually receive?

1965 - 1972: 250S, 250SE, 300SEb, 280S, 280SE, 280SEL, 280SE 3.5, 280SEL 3.5, 280SE 4.5, 280SEL 4.5, 300SEL, 300SEL 6.3, 300SEL 3.5, 300SEL 4.5
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MajorBenz
E Class
Posts: 55
Joined: Sun 21 Dec, 2014 7:10 pm
Model you own: w108
Region: Tasmania
Location: Melbourne

How many volts does the auto choke usually receive?

Post by MajorBenz » Wed 13 Feb, 2019 1:53 pm

Hi guys,
Another 6 month hiatus, but I am back working on my 280s!
Bench testing the auto-choke using a car battery as power source.
Seemed to be working fine but getting pretty hot.
Would it normally get 12 volts or is their something in the electrical system that would have dropped the voltage before it arrives at the choke?
Be gentle with me - it's 24 years since I did anything electrical...
Thanks in advance,
Dan
:)
Silver 1969 280S - "Grace"

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Bartman4800
300 SLR
Posts: 2078
Joined: Fri 10 Oct, 2008 12:10 am
Model you own: w111
Location: Perth WA

Re: How many volts does the auto choke usually receive?

Post by Bartman4800 » Fri 15 Feb, 2019 7:05 pm

It should be the normal 12V. It get a little warm, that's how the bi-metal spring works.

But only hand warm.. Make sure it does not short circuit internally.


Bart
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "daily driver"
2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
2011 Kia Sportage "Missus commuter Bus"
2002 Mitsubishi Rosa Bus (converting it to a motor home)

User avatar
MajorBenz
E Class
Posts: 55
Joined: Sun 21 Dec, 2014 7:10 pm
Model you own: w108
Region: Tasmania
Location: Melbourne

Re: How many volts does the auto choke usually receive?

Post by MajorBenz » Tue 26 Feb, 2019 10:29 am

Bartman4800 wrote:
Fri 15 Feb, 2019 7:05 pm
It should be the normal 12V. It get a little warm, that's how the bi-metal spring works.

But only hand warm.. Make sure it does not short circuit internally.


Bart
Thanks Bart.
Helpful as ever!
Silver 1969 280S - "Grace"

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