Factory temp gauge and aftermarket at the same time. - Chevelle Tech
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post #1 of 8 (permalink) Old Nov 26th, 13, 10:44 PM Thread Starter
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John
 
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Factory temp gauge and aftermarket at the same time.

Can I hook up the single wire that feeds my factory gauge signal and the aftermarket to the same sensor at the same time?
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post #2 of 8 (permalink) Old Nov 27th, 13, 12:57 AM
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Re: Factory temp gauge and aftermarket at the same time.

Most likely not. They probably require different sending units. Leave the factory one in place and jump the aftermarket one in another location IE on the intake near the thermostat housing if there is a port there.

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post #3 of 8 (permalink) Old Nov 27th, 13, 12:20 PM Thread Starter
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Re: Factory temp gauge and aftermarket at the same time.

I've got afr heads and there isn't a port. The one I'm using is the one by the manifold.
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post #4 of 8 (permalink) Old Nov 27th, 13, 12:28 PM
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Re: Factory temp gauge and aftermarket at the same time.

Could you drill and tap the manifold at one of the rear water ports?

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post #5 of 8 (permalink) Old Nov 27th, 13, 1:16 PM
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Re: Factory temp gauge and aftermarket at the same time.

I have seen upper radiator hose mounts that have a thread that you could install a sensor in!

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post #6 of 8 (permalink) Old Nov 27th, 13, 5:05 PM
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Re: Factory temp gauge and aftermarket at the same time.

I'm in the same boat- my temp sender is now in the manifold and I got a water neck with a boss that I put sender in for the electric fan control.

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post #7 of 8 (permalink) Old Nov 27th, 13, 6:48 PM
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Re: Factory temp gauge and aftermarket at the same time.

I tried to hook them up together and neither worked. The resistance is wrong or something. I tapped a hole in the intake right next to the water neck and everything works as it should.

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post #8 of 8 (permalink) Old Nov 27th, 13, 9:35 PM
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Re: Factory temp gauge and aftermarket at the same time.

Quote:
Originally Posted by jketron View Post
Can I hook up the single wire that feeds my factory gauge signal and the aftermarket to the same sensor at the same time?
No. The whole system is based on a voltage divider system. When you "add" to this simple circuit, now each gauge will be "reading" what they see--the sender with both gauges attached upsetting the original balance.

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