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#1 |
Senior Member
Join Date: Mar 2003
Location: St robert Mo
Posts: 2,001
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another dash wiring question
I am trying to wire in the brake warning light to an led. But the brake warning light on the harness never gets power. I thought it came on when you started the truck but it never gets more than .5 volts not enuf to turn on light. How do I know if it will light when brakes freak out?
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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#2 |
Registered User
Join Date: May 2006
Location: Jonesboro, AR
Posts: 916
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Re: another dash wiring question
The wire that goes to the valve that connects to the master cylinder. It should have a wire connected. When you touch the connector to ground it should light the dash.
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#3 |
Senior Member
Join Date: Mar 2003
Location: St robert Mo
Posts: 2,001
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Re: another dash wiring question
I see so pull wire on MC ground it and it should lite the dash? So the switch in the prop valve grounds when it is tripped makes perfect sense.
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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#4 |
Registered User
Join Date: May 2006
Location: Jonesboro, AR
Posts: 916
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Re: another dash wiring question
Yep. That's the only way a single wire could complete a connection, to ground. I wouldn't guarantee that's the only thing needed to light the bulb though.
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#5 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: another dash wiring question
well, actually, it IS supposed to light up when you have the key in crank position.
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#6 |
Senior Member
Join Date: Mar 2003
Location: St robert Mo
Posts: 2,001
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Re: another dash wiring question
upon futher testing the tan wire from harness has to be hooked neg on l.e.d and positive on l.e.d to 12 volt, then when I ground wire at MC it lights but still does not light when key is turned or do you actually have to crank motor over for it to light?
Thanks for help.
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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