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Regular
Posts: 52
| Hi all,
I'm wiring up an electric choke, and need keyed power. Where is a good place to tap into for this? I'm not great with wiring diagrams, so I could use some help! |
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Expert 5K+
Posts: 9902
Location: Lower Mainland BC | dludvik76 - 2019-05-04 8:30 AM
I'm wiring up an electric choke, and need keyed power. Where is a good place to tap into for this? I'm not great with wiring diagrams, so I could use some help!
Okay. This might not be the job for you then.
That said, make sure that the line that you add from the switched power to the choke (+) terminal has an in-line fuse in it.
Sources of power include right at the back of the ignition switch, as shown (for example only) for my 56 Dodge ignition switch (you will need to check this with a multimeter set to 20V DC). Use a ring terminal on your new choke wire and remember about the fuse.
Otherwise, you could tap into any other switched power such as the power *TO* one of the wiper, heater or defroster switches.
My car has an electric choke made by Echlin and it includes a relay that is triggered by switched power but feeds the choke with power from the battery (when the switch is on).
Have a read on this (NOTE the warning about NOT using the switched power to the ignition coil):
https://static.speedwaymotors.com/pdf/42545226.pdf
Good Luck
Edited by 56D500boy 2019-05-04 1:11 PM
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Expert
Posts: 1316
Location: Belgium, 40 miles south of Brussels |
I did not know that ... Why is that ?
(I think I did wire my electrical choke to the coil). |
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Board Moderator & Exner Expert 10K+
Posts: 13049
Location: Southern Sweden - Sturkö island | One reason is if the coil has an ignition resistor, then the choke will only get 7 volts (roundabout) when the engine is running.
It is better to connect the choke Before the ignition resitor - then it will always have 12 volts.
That said, check the resitance in the wire to the ignition resistance before connecting Another user there. The feed must be 12 volt otherwise the ignition coil wont perform optimal |
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Expert
Posts: 1316
Location: Belgium, 40 miles south of Brussels | wizard - 2019-05-04 9:54 PM
One reason is if the coil has an ignition resistor, then the choke will only get 7 volts (roundabout) when the engine is running.
It is better to connect the choke Before the ignition resitor - then it will always have 12 volts.
That said, check the resitance in the wire to the ignition resistance before connecting Another user there. The feed must be 12 volt otherwise the ignition coil wont perform optimal
OK I see.
But my coil is a Flamethrower model and I'm using an electronic distributor, so it does not require a ballast resistor.
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Expert
Posts: 3777
Location: NorCal | If there's no ballast, simply used the coil + terminal as the source for your electric choke. |
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