keeps blowing fuses!!!

[89harper]

the black wire with a red strip on the solenoid post keeps blowing fuses then i have no power what soever. i fired it up tonight and i watched it blow a 15 amp fuse as well as a 20 then it died and i had no power. what could be shorting out to make this happen?

thanks in advance

 

[miesk5]

yo!

Its prob the red/lt blue? look at the neutral safety switch; ck for grounded wire

or Black/orange and was Balck Red in some earlier years, - to alternator/Alt Voltage reg & spliced into the heavy yellow ? see http://img.photobucket.com/albums/v156/Blown79/76fand78bronco.gif by Blue79

Wiring Diagram in an 89 Source: by Cucamongan (Scotty) at SuperMotors.net

&

http://broncozone.com/uploads/monthly_02_2008/post-889-1203253150_thumb.jpg

by our buddy, Seabronc

or

will bbl or Sat.

 

[89harper]

thanks alot! i wonder if anything could be spliced in this to make it draw to much current?

 

[miesk5]

ok, I now assume you're working on the 82?

Just in case; its for the 90 or an 89 as I see you screen name is 89.... Check the alt conn.....

TSB 96-21-04 Generator Harness Connector

Publication Date: OCTOBER 7, 1996

FORD: 1985-90 ******, TEMPO

1986 TAURUS

1986-90 CROWN VICTORIA

1987-92 THUNDERBIRD

1987-93 MUSTANG

LINCOLN-MERCURY: 1985-87 LYNX

1985-90 TOPAZ

1986 SABLE

1986-90 GRAND MARQUIS, TOWN CAR

1987-92 COUGAR

LIGHT TRUCK: 1985-90 BRONCO II

1985-91 AEROSTAR

1986-91 ECONOLINE

1986-92 RANGER

1986-93 BRONCO

1986-94 F-150-350 SERIES

ISSUE: When a generator fails, there are a few failure modes that may cause heat to be produced at the wiring harness-to-generator connector. This excess heat may damage the female terminals on the wiring harness, resulting in increased resistance. The increased resistance produces more heat. When the generator is replaced, the resistance produced by a damaged connector may damage the new generator and could result in a repeat repair, including installation of another generator. High resistance (caused by a damaged connector) will not go away until the damaged connector is replaced.

ACTION: Visually inspect the harness-to-generator connector for damage (heat, corrosion, distortion and cracking) before installing a new generator. Install the Generator Wiring Harness Connector Kit (E5AZ-14305-AA) if the harness-to-generator connector is damaged.

The Generator Wiring Harness Connector Kit (E5AZ-14305-AA) contains the following:

One (1) Red Wire Butt Connector

Two (2) Yellow Wire Butt Connectors

One (1) Wire Connector Assembly

One (1) Instruction Sheet (I.S. 6849)

PART NUMBER PART NAME

E5AZ-14305-AA Generator Wiring Harness Connector Kit

OTHER APPLICABLE ARTICLES: NONE

SUPERSEDES: 95-25-04

WARRANTY STATUS: INFORMATION ONLY

 

[89harper]

thanks for the quick responce. i guess it would be the orange and black wire as it shows one to the solenoid in the diagram. yes the 82 is the one im working on. so after i check the connector and if it looks fine i should pull the alt and get it checked?

thanks

 

[miesk5]

ok, Check the alt's connector. Doubt that you have a bad alt right now.

 

[miesk5]

darn... hit the post button by error!!

if the conn loooks ok, then disconnect neg batty trem then positive; then you'll need to go thru ckt testing to see if there is a short to ground;

Troubleshooting with a Test Light (low resistance)

Source: by Chris B at http://blog.rv.net/2008/10/tech-troubleshooting-with-a-test-light/'>http://blog.rv.net/2008/10/tech-troubleshooting-with-a-test-light/

or

Troubleshooting with a Test Light (low resistance); "...low resistance test light can sometimes be used in place of a blown fuse. The light will illuminate while a short circuit to ground exists. DO NOT use a medium or high resistance test light in place of a blown fuse. These types of test lights illuminate with very small amounts of current and can be misleading..." read more

Source: by http://blog.rv.net/2008/10/tech-troubleshooting-with-a-test-light/

you can also use a meter if you have one.

If all is ok, then next would be a Parasitic Current Drain

Parasitic Current Drain Testing Methods

Source: by http://www.bbbind.com/Bulletins_Attachment/Parasitic%20battery%20draw.pdf

Parasitic Current Drain Testing Methods

Source: by http://www.4door.com/tech_tips/tech_tip0157.htm

Parasitic Current Drain Testing Methods

Source: by Larry H at http://www.mightyautoparts.com/pdf/articles/tt63.pdf