Hit a pothole in my 99bonne having electrical problems. voltage gauge drops and battery dies. checked everything i know. battery and grounds. not blowing any fuses

Without testing the battery an charging systems an checking for code's all anyone could do is make a guess as to what would cause this . How much do you know about automotive electrical system testing ? Do you have a volt ohm meter ? Test the battery an alternator out put ,videos on youtube. If the battery an alternator aren't working correctlly adding extra loads on the charging system could cause this problem . Turning on the heater blower motor on high an the rear defogger on ,will this cause the vehicle to die as well ? Or maybe a shared ground connection is loose or corroded . If the PCM/ECM or ECU - engine computer an the headlamps share a ground point could cause this problem as well .Looking at wiring diagrams an testing the electrical circuits with voltage drop testing is the way to test grounds . Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine size. Under system click on lighting , then under subsystem click on headlamps . Click the search button ,then the blue link . Watch this video on voltage drop testing an check headlamp ground circuit for resistance , with headlamps on engine off .
Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia

Battery problem or alternator or battery cable's ,connections etc.... Do you know how to test automotive electrical circuit's ? Voltage drop testing ? Using a voltmeter to test the battery voltage level ,12.6 is fully charged , 14. 00 with engine running .
Voltage Drop Testing the Starter
Charging System Problem Voltage Drops

You ran a hot wire from were to what on the starter ? Check grounds on the vehicle . Do you know about automotive electrical circuit's ? B+ side an ground side ? The Trainer 47 What measuring voltage on the ground side means You need wiring diagrams to see The Trainer 29 Understanding How Electrical CIrcuits Work and How to Test... You need to study up if you want to fix automotive electrical systems .

If when you turn the key to start an nothing happens , you have ignition switch , park neutral switch problem or an open in the start circuit . An when you jump the starter an get it running ,an then it dies when you step on the brakes or turn on the headlamps . That's more then likely a ground problem . Find a wiring diagram an see what all is on headlamp ground an brake lights . I had one awhile back had same problem , fuel pump an brake lights had same ground point . Do you know what a wiring diagram is , how to read one ? You can find one at http://www.bbbind.com/free_tsb.html

Also check out videos on voltage drop testing !

Check battery to motor and battery to body ground for corossion. Also check motor to body ground strap condition and for corossion under mounting bolts. Poor grounding can cause all kinds of electrical problems

Bad connection. Could be ground or hot side. Check all battery cable connections and ground connections. Also check the charge wire from the alternator to the fuse box.

What's to help ? Do you know how to test electrical circuits ? Using a DVOM - digital volt ohm meter an electrical wiring diagrams , test power an ground circuits . Find wirng diagrams here http://www.bbbind.com/free_tsb.html Watch these videos on electrical testing Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts
How to Use Multimeter to Troubleshoot Common Problems YouTube
Check for DTC'S - diagnostic trouble codes .
Electric Testing Techniques You Need to Know
There are no magical fix's for automotive electrical problems , testing for B+ voltage an good grounds .

First off, add a new ground wire from the engine to the body just for the hell of it. Now clean all the battery cable connetors aat all point and add WD40 afterwards. Also check connectors from dash panel to engine circuits. This is real suspect. WD 40 them also

With this type of electrical problem, as with many...The first thing you look for is a bad ground. Start with negative cable from battery. Follow it down to the frame. Make sure the connections are tight, clean, and undamaged. make sure you have a ground from: Bat to frame, bat to engine, engine to frame.Next, ck your Positive connection at the starter, as well as the solenoid (smaller wire) Take your multimeter and connect to your positive lead...watch for voltage drop while trying to crank.

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theroad

Alternator......period.

Charging system grounding out, poss inside alternator