Dash lights
Logistics Pro
Joined: Jun 2018
Posts: 3,550
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That was what we wanted to hear. sounds like something is wired into those lights that is back feeding them. Check for splices from the ignition and light switch. Is there a newer radio or any other obvious addons?
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5th Wheeling
Joined: Jan 2020
Posts: 40
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Question 4
I am talking about the instrument panel light where the light is for speedometer fuel temp alt oil .
the two red lights which are the alterna and oil light
work fine the go out when truck is on
I am talking about the instrument panel light where the light is for speedometer fuel temp alt oil .
the two red lights which are the alterna and oil light
work fine the go out when truck is on
Cargo Master
Joined: Sep 2005
Posts: 2,954
Likes: 64
Alex, I'm thinking that the instrument panel case is getting 12V + when you turn the key on. Then when you turn the head lights on it puts 12V+ to the instrument light wire, so you have 12v+ on both sides of the bulb and the light goes out.
Put your test light clip the "-" battery post and touch the probe to the instrument panel case with the key on, I'll bet it is live.
Eric
Put your test light clip the "-" battery post and touch the probe to the instrument panel case with the key on, I'll bet it is live.
Eric
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5th Wheeling
Joined: Jan 2020
Posts: 40
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Cargo Master
Joined: Sep 2005
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If I am correct, if you pull the 2a fuse out of the fuse panel and check the 2 fuse connections with the key off they will both be dead, with the key on one will be hot, and if you turn the lights on with the key on, both connections will be hot with the fuse removed.
Cargo Master
Joined: Sep 2005
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no the back of the cluster is stamped sheet metal.where the light sockets plug into. do the light sockets have one wire or 2?