Car Loses Voltage Over Small bumps in road and speed bumps

[Oxfordwhite01gt]

My car starts strong, I can turn on the high beams, radio, brake lights, etc when sitting in the driveway. When I pull out of my driveway and start driving, the voltage meter jumps to “L” and then goes to a little over the middle, back and forth when I’m driving. I can’t really drive it anywhere because when the voltage is low the blinkers don’t work and the lights don’t work either (Super Dim). I’m 16 with not a lot of electrical knowledge. I don’t really want to take it to a shop so anyone who can help please do. Much appreciated.

 

[Oxfordwhite01gt]

The first picture is pretty blurry but it is code dt E776

 

[Oxfordwhite01gt]

The first picture is pretty blurry but it is code dt E776

Also I forgot to say the odometer goes dim and the mileage goes to “- - - - - -“

 

[Mustang5L5]

I'd start at the battery and wiggle test all the wires. You likely have a loose connection somewhere and when you hit a bump, things shift. Start at the terminals and go to the fuse box and check your grounds as well. ANy sort of corrosion would be a high-resistance connection and something you should do as well. Replace suspect terminals.

 

[chilsam]

my 93 did that..it was a short in the 361 circuit...power wire to IAC was grounding out thru an opening n insulation on the mounting ear on the manifold