A string of electrical problems. Help needed!

Yellow302

Member

Mar 2, 2003

789

2

19

NJ

Oct 26, 2008

#1

• Oct 26, 2008

• #1

Symptoms:

No Head Lights.
No Tail Lights.
No Brake Lights.
Cannot take shifter out of park.
No gauge lights.
When you pull the light switch it flashes for a split second.
Alternator not charging battery.

Resolutions:
Checked all power going to and from the fuse block.
Checked all fuses under hood and dash.


Need your input guys...

I have the Starter and alt tied down to one power wire, then this 10 inch wire goes to to fuse block on top of the battery cable. All grounds were relocated to the under body, wire wheeled clean and self tapped in solid. No other wires were spliced, just relocated when i put the new engine in. Anything is possible... looking for avenues to pursue.

 

Yellow302

Member

Mar 2, 2003

789

2

19

NJ

Oct 27, 2008

#2

• Oct 27, 2008

• #2

ttt

 

R

reldapimp

New Member

Jul 12, 2005

94

0

0

Oct 27, 2008

#3

• Oct 27, 2008

• #3

didnt ground a power wire...

 

Yellow302

Member

Mar 2, 2003

789

2

19

NJ

Oct 27, 2008

#4

• Oct 27, 2008

• #4

i hope not, i would need a diagram of the wires from the fuesbox to check. does anyone have one?

 

Yellow302

Member

Mar 2, 2003

789

2

19

NJ

Oct 27, 2008

#5

• Oct 27, 2008

• #5

ok good news...

http://www.veryuseful.com/mustang/tech/engine/images/Mustang-94-95-Exterior-Lighting.gif

EVERYTHING that is listed here is my problem. so I checked all the fuses and they are fine, so it must be a melted wire or something thing.

I wish i had a better diagram to look through this.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Oct 28, 2008

#6

• Oct 28, 2008

• #6

If you have not, check the underhood fuses. They feed the interior fuses:

Underhood fuse diagram

If that doesnt cover it, I'd inspect the headlight switch and connector.

Good luck.

 

2BADSTANGS

Member

Jun 19, 2008

385

1

18

Colorado

Oct 28, 2008

#7

• Oct 28, 2008

• #7

Fusable links???

 

R

reldapimp

New Member

Jul 12, 2005

94

0

0

Oct 28, 2008

#8

• Oct 28, 2008

• #8

get a 4 guage wire and connect it to the negative battery post and then keep moving it around on different spots on the engine to see if this helps anything... if it does.. you have a ground issue.

 

Yellow302

Member

Mar 2, 2003

789

2

19

NJ

Oct 28, 2008

#9

• Oct 28, 2008

• #9

what if i blew out a relay? how would i check that?

 

Chythar

Recently finished repairing my rear

20+ Year Stangneter

Aug 26, 2004

2,373

140

113

Foothill Ranch, CA

Oct 28, 2008

#10

• Oct 28, 2008

• #10

I'd like to know this one as well - I blew the fog light relay on my Cobra conversion as soon as I hooked up the battery.

 

Yellow302

Member

Mar 2, 2003

789

2

19

NJ

Nov 24, 2008

#11

• Nov 24, 2008

• #11

The headlight switch harness was cooked, and the part that plugged into the firewall from the fues box was never tightened down (wooopseee) lol.

Things i did, new alt, new fuesbox and full harness to all headlights, replace headlight switch and harness....

Fireing it up soon... hope she works!

 

Yellow302

Member

Mar 2, 2003

789

2

19

NJ

Nov 24, 2008

#12

• Nov 24, 2008

• #12

the headlight harness is burned but still works so my problem was else where, the car is running but needs more trans fluid and a tune, its pretty far off.

 

M

madams74

Founding Member

Jan 26, 2002

664

1

17

Maryville, TN

Nov 26, 2008

#13

• Nov 26, 2008

• #13

Seen this before. Pull the green colored ring terminal grounds on the upper radiator support next to the battery area. Should be a few of them. Once removed sand the terminals clean and also the metal around the screw on the upper radiator support. Happens a lot. These are the key grounds in the system.

 

Yellow302

Member

Mar 2, 2003

789

2

19

NJ

Nov 26, 2008

#14

• Nov 26, 2008

• #14

well everything works now except the damn charging system, i have changed 2 alternators and checked the voltage at 12.5 on the power feed, i found the yellow wire off the alt that goes to the fuse box to be broken, so i repaired it... changed the fuse in the engine fuse box out with a new one.

I dont know what else to check, im at a loss and going to killmyself... 6 month project and it just wont fing work for me...

 

Yellow302

Member

Mar 2, 2003

789

2

19

NJ

Nov 26, 2008

#15

• Nov 26, 2008

• #15

So i have the step by step ford service technician software for our cars to diagnose and test everything... I ruled out that one alt is in fact bad. The second one i installed passes all tests....

Things i haven't changed are the power line from the use box to the alt, but i read equal to battery voltage... 12.5 now there is a fuse in the line, but it the fuse was bad i'm pretty sure i shouldn't have any voltage coming through.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Nov 26, 2008

#16

• Nov 26, 2008

• #16

Diagnostics for the alt have been thoroughly posted in here before.

Very briefly, at the reg, A reads battery voltage, I reads nominal voltage, and S reads about 1/2 battery voltage.

 

Yellow302

Member

Mar 2, 2003

789

2

19

NJ

Nov 26, 2008

#17

• Nov 26, 2008

• #17

i know what the issue is.... the new alt is powder coated... my brackets have been primed and painted, there is no way the alt is being grounded through the engine.

And i'll be damned if i'm going to pull everything out and grind it down, way too much work... i'm going to wire wheel the bracket at all the spots it connects and just put a new ground from the alt and bracket bolt... then run it to a fresh spot on the frame!

I checked all fuses too and they are fine, it has to be this!

it might be happy turkey day after all!

 

Yellow302

Member

Mar 2, 2003

789

2

19

NJ

Nov 27, 2008

#18

• Nov 27, 2008

• #18

madams74 said:

Seen this before. Pull the green colored ring terminal grounds on the upper radiator support next to the battery area. Should be a few of them. Once removed sand the terminals clean and also the metal around the screw on the upper radiator support. Happens a lot. These are the key grounds in the system.

Click to expand...

the battery was moved to the trunk, that has happened to me about 2 years ago, car didnt want to start because those little guys were so corroded.

right now that alt has nothing to ground to... ill fix that later, now my friend is staying away from powder coating anything on his mustang!

 

Yellow302

Member

Mar 2, 2003

789

2

19

NJ

Nov 28, 2008

#19

• Nov 28, 2008

• #19

so i got everything charging again

ran a ground from the alt bolt to bracket after wire wheeling the crap out of the joining pieces.. had a extra 4 gauge so i slapped it on there, held volt meeter to the case of the alt, and the power source. Everything was good, 12.xx volt.

The ground that i have running from the engine to the frame is not actually grounding the block... where is a good place to run a new ground?