Car Lost All Electricals.

98Mustang2017 · Aug 31, 2017

Replaced fuel injectors, put car in "on" position... power and lights to the car.
Went to start it.. lost all power. Not even the click of the starter and not even a glimpse of light.
Battery has 12.6volts.All fuses in the fuse boxes are good.

So what happened? I've heard about fusible links could go bad? Was it just a coincidence that it was time for fusible link to be replaced the same time i replaced my injectors?

Neuron · Aug 31, 2017

Clean your battery connections and grounds. Check the voltage when you hit the key to start it.

wmburns · Sep 1, 2017

+1 on above.

To add check the grounds around the radiator core support PLUS the battery negative as it's bad about splitting.

Here's some more information on how to trouble shoot.

Howto perform charging system voltage drop test
https://www.stangnet.com/mustang-fo...perform-charging-system-voltage-drop-test.56/

Test for +12 volts at the alternator main B+ terminal. Test for +12 volts at the battery junction box large terminal. If there's power at both locations then likely the fusible link is OK.

Here's another low tech method to test for a possible bad connection at the battery. Turn the head lights on. Are they bright? Now try the starter. Do they headlights dim or go out?

98Mustang2017 · Sep 2, 2017

Is this relay popped? The starter and my horn relay both look similar to this like the connection split open.

imp · Sep 3, 2017

wmburns said:
+1 on above.

Turn the head lights on. Are they bright? Now try the starter. Do they headlights dim or go out?

....."Here's another low tech method to test for a possible bad connection at the battery. Turn the head lights on. Are they bright? Now try the starter. Do they headlights dim or go out?"

Excellent thought. I've seen battery terminals so squirrely that they allowed headlights and other accessory loads to work normally, but the sudden surge of starter current went "bam", and then nothing else happened. Waited awhile, light loads worked again!

Keep them battery terminals and posts clean & lubricated, and TIGHT. imp

98Mustang2017 · Sep 3, 2017

wmburns said:
Here's another low tech method to test for a possible bad connection at the battery. Turn the head lights on. Are they bright? Now try the starter. Do they headlights dim or go out?

The lights don't even come on. 12.6volts of power coming out of the battery and not a single electrical turns on. Posts are really clean. cleaned grounds as well.

wmburns · Sep 3, 2017

98Mustang2017 said:
The lights don't even come on. 12.6volts of power coming out of the battery and not a single electrical turns on. Posts are really clean. cleaned grounds as well.

The headlights are powered from an "always on" circuit from the Battery junction box. IF the headlights don't come on this likely means there's no power in the BJB.

Voltage tests were given to help rule in/out a bad battery cable or fusible link. What were the results?

98Mustang2017 · Sep 4, 2017

Turned out to be the battery connectors. They weren't "wrapped" all the way around the terminal posts. Had to bend it back to shape.

Now onto my next question.... https://www.stangnet.com/mustang-forums/threads/low-acceleration-running-4-56-gear-though.899926/

imp · Sep 4, 2017

98Mustang2017 said:
Turned out to be the battery connectors. They weren't "wrapped" all the way around the terminal posts. Had to bend it back to shape...........

Post #5 predicted it. imp

Car Lost All Electricals.

98Mustang2017

Active Member

Neuron

wmburns

98Mustang2017

Active Member

imp

Mustang Master

98Mustang2017

Active Member

wmburns

98Mustang2017

Active Member

imp

Mustang Master

Similar threads

Car Lost All Electricals.

Active Member

Active Member

Mustang Master

Active Member

Active Member

Mustang Master

Similar threads

Privacy & Transparency

Privacy & Transparency