Question about Nissan Pickup

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I have lost power to the windows, blower, turn signals,temperature gauge and tachometer. All other electrical devices seem to be working. I checked all fuses and find none failed. Is there a common power source for these that feeds the fuses. This is the second time this has happened. It was last "fixed by bump." Short maybe. Where?

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  • barnboy1 Aug 22, 2010

    I went to try your recommendation and when I started the truck everything was working. It "cured itself" ovenight while parked in the garage. Can a fussable link fail intermittently.





    This is the second time it self-healed. The first time I was driving it and they all came back.





    I did notice this time that the clicking sound of the flasher unit seemed louder. Could I have some flaky component that supplies voltage to theses accessories that is now suppling full voltage.



    Is there somewhere I can look at a wireing schematic.



    Thanks.

  • barnboy1 Aug 25, 2010

    The saga continues. Yesterday I had been driving for a total of about 50 miles with everything working fine. Then after the third stop of the day the failure recurred.

    I drove it home with the failures and parked it in the yard ovenight.

    This morning I got in it, turned the key and everything is working okay.

    How many rounds does it take to shoot a pick up.

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  • Nissan Master
  • 17,970 Answers

I would suspect you have blown fuseable link. A fuseable link is a piece of wire that is designed to melt when the circuit is overloaded like a fuse. It look s like a regular piece of wire, usually larger than the other wires in the system. they can be hard to locate sometimes. The one you are likely looking for should be close to the alternator in the wiring harness.

Start at the alternators positive terminal and start tracing through the harness and look for a wire with soft insulation or melted or burnt look. When you find the bad link you can either buy a new one or simply cut out the bad one and splice in a universal fuse holder with the correct size fuse installed.

Tell us news.

Posted on Aug 19, 2010

  • ZJ Limited
    ZJ Limited Aug 25, 2010

    This is crazy. I
    do not have any specific electrical diagram, however, suggest doing a
    detailed inspection of the wiring, measuring voltages in each of the
    circuits involved, could be some "ground" in any of them.
    Keep us updated.

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My guages stoped working and transmition seems to be slipping in my 2001 shevy silverado 4.8


Well ronnie do you know how to do automotive electrical testing with a volt meter ? How to read an understand a wiring diagram ? Would think not to be a relay problem because other thing's would not work as well ! More then likely a loose ground or something on that order ! Plus you must mean Ignition . 1 relay , because there isn't a eng.1 relay . Ign. 1 relay powers the PCM - engine computer , fuel injectors , the TAC - electronic throttle control module . Do the instrument cluster lights still work when the gauges quit ? Looking at power distribution diagram I see a engine 1 fuse but has nothing to do with the instrument cluster . Supply's B+ voltage to the maf sensor , EVAP system , CAM sensor , IAT sensor , fuel pump relay ! Could be a communication problem on class 2 data bus . All the modules on the vehicle share information on the class 2 bus . The gauges get thier info from the PCM over this data network !
Engine Coolant Temperature Gauge
The IPC displays the engine coolant temperature as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the engine coolant temperature. The engine coolant temperature gauge defaults to 75°C (160°F) or below when:
• The PCM detects a malfunction in the engine coolant temperature sensor circuit.
• The IPC detects a loss of class 2 communication with the PCM.

Fuel Gauge
The IPC displays the fuel level as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the fuel level percent. The fuel gauge defaults to empty if:
• The PCM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of class 2 communications with the PCM.
When the fuel level is less than a pre-determined value, the low fuel indicator illuminates.
Reviewing the fuel system description will further explain how the system functions. Refer to:

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The IPC displays the vehicle speed based on the vehicle speed signal from the PCM. The IPC receives the vehicle speed signal via a discreet wire. The IPC uses the vehicle speed signal circuit (4000 pulses/mile) from the PCM in order to calculate the vehicle speed. The speedometer defaults to 0 km/h (0 mph) if a malfunction in the vehicle speed signal circuit (4000 pulses/mile) exists.

Tachometer
The IPC displays the engine speed based on the engine speed signal from the PCM. The IPC receives the engine speed signal from the PCM via a discreet wire. The IPC uses the engine speed signal circuit (2 pulses/engine revolution) from the PCM in order to calculate the engine speed. The tachometer defaults to 0 rpm if a malfunction in the engine speed signal circuit (2 pulses/engine revolution) exists.
Transmission Temperature Gauge
The IPC displays the transmission temperature as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the transmission temperature. The transmission temperature gauge will default to 40°C (100°F) or below if:
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The only one that has a hard wired sensor is the oil pressure gauge.
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Does this one drop out also ? quit working

I would suggest that you take an have the IPC checked for DTC'S - diagnostic trouble codes , NOT OBD 2 engine codes , these are different an need a professional type scan tool .
You could check G103 for being loose . G103
On the left rear of the engine block . Also pull the instrument cluster out an check connection at the back of IPC . Check power an ground circuits at the PCM as well . You can fine wiring diagrams here
http://www.bbbind.com/free_tsb.html Enter the vehicle info . year , make , model an engine . under system click body an acc. then under subsystem click on instrumentation .Click the search button , then click the blue link . At the top of the diagram it shows B+ power supply , The connectors on the back of IPC , A,B , plus the pin # an color wire .
PCM power and ground testing avi
How To Use Multimeter Test Car Ground Video 3
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