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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Re: I have lost power to the windows, blower, turn...
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.
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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.
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:
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.
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:
• The PCM detects a malfunction in the transmission temperature sensor circuit.
• The IPC detects a loss of class 2 communications with the PCM.
The IPC displays the system voltage as detected at the ignition 1 input of the IPC. When the engine is ON, the gauge should be between 10 and 16 volts.
The only one that has a hard wired sensor is the oil pressure gauge.
Engine Oil Pressure Gauge
The IPC uses the engine oil sensor signal to determine the engine oil pressure. The oil pressure sensor signal circuit is hard-wired to the IPC. The engine oil pressure sensor signal to the IPC is a variable resistance ranging from 0-90 ohms. A sensor resistance of 1 ohms will display as 0 psi (0 kPa) and a resistance of 88 ohms will display as 80 psi (550 kPa). The Check Engine Oil Pressure indicator will be displayed in the message center if the IPC detects a low engine oil pressure.
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 Intermittent Electrical Diagnostics with Rich Peterson
Both? A 7.5A "Gauge" fuse provides power for the oil press, temp, volt, and the solenoid coil for the rear window relay. The actual power for the rear window comes from somewhere else probably the 30A Power CB.
Try checking the ignition switch. Sometimes the internal contacts for the thick (aprox. 10ga) pink, dark green, or orange wires start to wear out. Check to see if you have power to all three when the key is in the on position. Seems like you might be losing power intermitantly on one of these. I've fixed this problem before by taking the switch apart and cleaning the contacts with 400 grit sand paper, but it takes a little skill. There are a few springs and tiny parts that can get lost. You can also replace the whole switch if you dont want to bother yourself with all the tiny pieces.
The blower fan is powered by a 30 amp circuit breaker.Its in the box at the pass kick panel. Is it getting power through it? The blower relay is powered through the GAUGE fuse 7.5 amp. Check ALL the fuses. There is a 30 amp fuse that powers the ign switch also. If you get the blower working I think everything else will work.