Question about Buick Cars & Trucks
Resistance in the electrical circuit . Using voltage drop testing is the way to find this type problem .
Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia
Do you own a DVOM - digital volt ohm meter ? Know how to use one ? Do you know what a wire diagram is an how to read an use one to pin point places in a wiring harness to do circuit testing ?
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts
Free wiring diagrams http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click on lighting , then under subsystem click on HeadLamps . Click the search button then on the blue link.
The lamp switch is a input to the BCM , the BCM energizes the high beam relay . With a amp meter jumped into where the relay plugs into , pin's 30 & 87 ,check current flow . If you look on the bottom of the relay you will see numbers 30 & 87 this is the load side of the circuit . Numbers 85 & 86 are the control side . The high beam relay is located in the under hood fuse / relay box. #34 Do you know what a relay is a how they work ?
VEHICLE RELAYS Testing from the relay base They use relay's for all kind of thing's , horns , light's , power to ignition circuits etc...
VEHICLE RELAYS Operation Diagnosis
Posted on May 14, 2017
There are two reasons I can think of why the headlamp connector is melting. Clearly it is getting too hot. The materials used should be able to withstand the heat from a standard headlamp bulb.
Either too much current is flowing due to the incorrect wattage of bulb being fitted or perhaps the bulb is defective in some way.
Perhaps the connection isn't very good. If the connection between the wire and the terminal or the terminal and the bulb is dirty or loose it will provide an electrical resistance and when lots of current flows it will generate heat. If the connection is loose or a spring-loaded construction designed to be easily fitted or removed and is subject to vibration or sometimes temperature changes, there can be a small amount of arcing which also generates heat.
Posted on May 14, 2017
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Posted on Jan 02, 2017
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