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FFCobra Craftsman
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1,297 Posts
Discussion Starter · #1 ·
Code #96 comes up as a Fuel Pump secondary circuit failure. Is this the inertia switch? I made sure the red button was pushed in and tried again and nothing.

Mike O.
 

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3 Generations on a MkIII
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1,415 Posts
What computer are you running? On a Mustang Mustang EEC-IV a 96 - Fuel pump secondary circuit failure - the problem is battery to PCM (Powertrain Control Module)

HTH.
 

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FFCobra Craftsman
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1,297 Posts
Discussion Starter · #3 ·
Sorry should of specified. A9L comuter running the Mass Flo system.

I unplugged the inertia switch an stuck a test light in the terminal comming from the relay. It comes on as soon s you turn the key. godes back out then flashes and stays off.

The relay clicks a couple of times and then stops. I tried one of the other relays and it does the same thing.

Mike O.
 

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3 Generations on a MkIII
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1,415 Posts
Wow. You got me. I was gonna' say to chcek the ground cable from the tank to frame... but now..

Bypass the entire inertia switch. Start to eliminate variables.
 

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Charter Member
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806 Posts
Mike,

Searched Fuel Pump secondary circuit failure and came up with this:
Fuel pump secondary circuit failure. The EEC senses infinite resistance to ground from the fuel pump on the Fuel Pump Monitor circuit.
Possible Causes:
> Fuel pump secondary circuit short to power.
> Fuel pump relay contacts always closed.
> Open in FPM circuit between EEC and connection to the power-to-pump circuit.
> Left O2 short to power.
> Damaged Computer.

Kenny
 

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3 Generations on a MkIII
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1,415 Posts
Mike. Your PM box is full. Did you trace down the problem?
 
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