Loose ground?

hambone69

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Sep 8, 2010
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i have a 95 bronco 302 and having problems starting and shuts off while running. I've changed/inspected most of the starting system and was wondering if anybody has a diagram or could tell me where the grounds are located?

 

oktogo

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york sc
the block ground should be on the passenger side of the engine, thats all i know of.

 

Seabronc

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Battery ground goes from the Battery (-) to the passenger side front of block, from there to frame. The other engine ground is from the rear driver side of the intake to The fire wall, (braided strap or a number wire).

Good luck,

:)>-

 

miesk5

96 Bronco 5.0
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yo,

Seabronc got it correcto mongo again!

Here are some pics & diagrams, diff years & engine type in some, but all are same as your 95. I've been collectng em for awhile and figured now is da time to post em up and add/change em as I get my eyes coordinated w/my brain. I may have mixed some up such as in instr panel showing "upper ground" confused w/"lower ground"

Engine Block pic in a 94 5.8; "...The black battery wire goes from the front bolt of the engine mount (on the block) to this tab & up to the battery post, where a smaller black wire goes to the core support, providing a continuous ground path between the engine, frame, battery, & body..."

Source: by CodysBigBlueBronco (how much $???) at SuperMotors.net



====

Frame & Battery pic in a 93; "...With the wheelwell gone, it's easy to inspect the frame ground, just inboard of the spring tower on top of the frame rail. The battery ground cable is stripped ~3/4" and a tab is soldered on so it can be bolted to the frame..."

Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net



===

Intake Manifold to Block Strap Location pic in a 96 5.0

Source: by boss (bossind, Steve) at SuperMotors.net



it is between 2nd & 3rd plugs on passenger side

======

All remaining from the 96 Ford Workshop Manual



Fender Apron (passenger side)

G101 front of engine compartment, front of fender apron (D1) - RH = Passenger side mine has 2 small black wires between starter relay & headlight; this is #5 in the diagram

Location pic by Steve83

http://www.supermotors.net/getfile/829927/thumbnail/enginebay93rhf.jpg

5 — Body Grounds (Part of 12A581)

19 14301 Chassis Ground

---------

Fender Apron, Left



10 N806972-S36MG Screw to Ground Wire Assembly this;

G100 & G104 (tied together in diagram)

G100 @ LH front of engine compartment, on upper radiator support

G104 @ Rear of LH fender apron near hood hinge and 4WABS Test Connector (RED)

G100 Serves Component:

LH Oxygen Sensor

Fuel Pump Module

Inertia Fuel Shutoff

Misfire Sensor

Misfire Sensor Shield

Output Shaft Speed (OSS) Sensor

Powertrain Control Module (PCM), 5.0L

..

G101 Serves RH Oxygen Sensor

....

G104 Serves Component:

Component

4WABS Control Module

4WABS Data Link Connector

4WABS Relay #1

Instrument Cluster

Powertrain Control Module (PCM), 5.0L

Powertrain Control Module (PCM), 5.8L

Programmable Speedometer/Odometer Module (PSOM)

Trailer Relay Box

============

Engine Starter Subsystem and Battery, 5.0L, 5.8L and 7.5L Engines



12 14301 To Engine Ground

18 12A581 Body Grounds

19 14301 Chassis Ground

23 N802777-S36 Bolt for 14301 Frame Ground (same as in Steve83's pic)

G103 (battery to engine) Lower RH front of engine

Component

4WABS Pump Motor

Battery

Data Link Connector (DLC)

Mass Air Flow (MAF) Sensor

Powertrain Control Module (PCM), 5.0L

Powertrain Control Module (PCM), 5.8L

Right Front Park/Turn Lamp

Right Front Side Marker Lamp

Right Headlamp

===

Cowl, Dash Panel and Door Wiring



7 — To Ground (Part of 14301) This is G201 Behind bottom of LH cowl panel (driver's side kick panel)

Component

Compass/Outside Temperature Module

Day/Night Mirror

Inside Cargo Lamp

Left Power Lumbar Compressor Motor

Outside Cargo/High Mount Stop Lamps

Right Power Lumbar Compressor Motor

Seat Belt Switch

Door Lock Actuator (PDL & Probably Power Window Motor)

===

Instrument Panel Wiring Installation, F-150, F-250, F-350 and Bronco (Gasoline Engines)



36 14463 To Ground (this is G201); it is on pass side

==

RH Inner Cowl Wiring pass side



8 — To Ground; this is G200 Behind bottom of RH cowl panel

Component

Air Bag Diagnostic Monitor

Electronic Shift Control Module

Instrument Cluster

Programmable Speedometer/Odometer Module (PSOM)

Remote/Keyless Entry Module

Speed Control Servo/Amplifier Assembly

===

Trailer Tow Wiring (Rear Frame), Bronco



5 — Trailer Tow Ground Wire (Part of 14405); This is G401 @ LH rear corner of cargo area, near rear lamp assembly

=======

From my Notes:

G103 (battery to engine) Lower RH front of engine Component

4WABS Pump Motor

Battery

Data Link Connector (DLC)

Mass Air Flow (MAF) Sensor

Powertrain Control Module (PCM), 5.0L

Powertrain Control Module (PCM), 5.8L

Right Front Park/Turn Lamp

Right Front Side Marker Lamp

Right Headlamp

========

NOT SHOWN:

G400 Rear Window Defroster @ LH rear corner of cargo area, near rear lamp assembly

 
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