Question about 1989 Ford Mustang

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No electrical power

I was trying to install a power booster and I ended up blowing something and now there is absolutely no electrical power at all. I replaced the main wiring harness, tried the enertia button but nothing has worked

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  • Mark Stuart
    Mark Stuart May 11, 2010

    Have you checked the main fuse in the engine bay fuse box? This should blow to protect the electrics in the case of a major short.

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  • 58 Answers

Are you sure you checked all of the fusible links, that is the most likely cause of your problem. They will usually look burnt when they go out but not always, sometimes the burnt place will be on the bottom side of the wire and not easily seen. Do a continuity check on all of them but be sure to disconnect the negative battery cable before you do.

Posted on Jan 10, 2009

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Usually theres a plastic valve mounted on the booster thats connected to a vacuum source. Remove it from booster(they usually just pull out) & hose, then suck& blow on one end. Air should pass only one way. If it passes both ways the valve should be replaced. Check to c if hose holds vacuum by placing thumb on hose end to feel for suction (motor running) & to listen for hissing. Replace hose if suction is low &or hisses. Could be a vacuum leak elsewhere in wich case performance would suffer & idle would be eradical.

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Hi, my name is John I will do my best to assist you.

To Remove
  1. Disconnect the negative battery cable.
  2. Disconnect the filtered air tube from the throttle body and air cleaner housing.
  3. For SOHC engines, remove the air cleaner inlet tube.
  4. For SOHC engines, detach the electrical connectors from the engine coolant sensor and the camshaft position sensor.
  5. For DOHC engines, unplug the electrical connector from the camshaft position sensor.
  6. For SOHC engines, remove the brake booster hose and the electrical connectors form the holders on the end of the cylinder head cover.
  7. Unfasten the camshaft position sensor mounting screws, then remove the sensor.
  8. Loosen the screw/bolt attaching the target magnet to the rear of the camshaft.
To Install: NOTE: The target magnet has 2 locating dowels which fit into the machined locating holes in the end of the camshaft.

  1. Install the target magnet in the end of the camshaft. Tighten the retainer to 30 inch lbs. (3.4 Nm).
  2. Install the camshaft position sensor. Tighten the sensor mounting screws to 80 inch lbs. (9 Nm).
  3. For SOHC engines, place the brake booster hose and the electrical harness in the holders on the end of the valve cover.
  4. Attach the electrical connector(s) to the camshaft position sensor and coolant temperature sensor (if necessary).
  5. Install the air cleaner inlet tube and the filtered air tube.
  6. Connect the negative battery cable.
The camshaft position sensor is mounted to the rear of the cylinder head - SOHC engine shown


tecnovative_139.gif
Location of the camshaft position sensor - DOHC engine shown

tecnovative_140.gif

Unfasten the retaining bolt, then remove the target magnet from the rear of the camshaft - SOHC shown, DOHC similar

tecnovative_141.gif

The target magnet has 2 locating dowels for proper alignment during installation

tecnovative_142.gif

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