Question:
The mechanic just repaired some electrical problem with the car. He said their was some ground or something. So they fixed it.
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But still the Panel Lights of A/C & Heater turns off when I hit the break. What's the problem? Help.
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Could this still be electrical problem?
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Thanks for your time.
Answers:
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Does the car have the original radio in it or has it been replaced? The problem is with a ground for the lighting circuit. You've probably heard the phrase "the path of least resistance". It applies to electrical circuits in that any device needs a power source and ground (Earth) to work. When the ground becomes loose or corroded, there is excessive resistance on the ground side and the electricity will flow to another ground if there is a path of lesser resistance. In your case, the path of least resistance is through the brake lamp switch circuit.How do you know if your intake manafold is going bad in your car?
There is something that is tied into the instrument panel lighting that is grounding through the brake lamp circuit until you step on the brakes. when you step on the brake, the brake lamp switch closes and power flows through that circuit and it can no longer supply the ground for the panel lights; thats why they go out when you step on the brakes.
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i usually see this happen when an aftermarket radio is installed and they tie it into the dash lighting so that the radio lights up at night when you turn the headlights on. If the radio isn't grounded properly, stuff like this happens. Also, aftermarket alarms are usually tied into lighting systems to detect current flow when a door is opened. If the alarm ground is loose the same thing can happen.
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If its the original radio then you need to have someone who knows something about automotive electricity check all of the grounds. Again, if it's all original equipment, there is probably corrosion on one of the instrument panel grounds that is causing the panel lights to seek another ground through the brake lamps.
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It's definitely an electrical problem, you need to either take it back to him or get another mechanic, he doesn't know what he is doingIf this problem didn't start until after the repair, be afraid... be very afraid.
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