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Re: 2 Problems.Turn signal arm will not reset.Fuel gage...
There is a clicker thing that cuts the switch off when you turn the wheel it must be broken. Fuel gauge is controlled by the sending unit in the gas tank. thats a pain to replace, not to mention having to breathe gas fumes the whole time you do it. some cars you have to pull the tank and others you just have to take out the back seat and pull off a panel.
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Did you visually check for spark at the spark plugs, engine cranking? Does the dist rotor turn when you crank it? Did you use a gage and check correct fuel pressure? Any applicable trouble codes? To check codes, yourself, at the least, you need an obd2 code reader.
If you have the spider fuel system, that system is noted for problems. No, the fuel system shouldn't cause a no spark. If no rpm signal, that will usually stop the injector pulse along with other issues.
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 gage 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.
Hooking up a professional or factory scanner an checking input data to the PCM from the sending unit inside the fuel tank ,viewing the information sent to the IPC , Checking for diagnostic trouble code's .
The fuel level sender changes resistance based on fuel level. The PCM monitors the signal circuit of the fuel level sender in order to determine fuel level. When the fuel tank is full, the sender resistance is high and the PCM senses a high signal voltage. When the fuel tank is empty, the sender resistance is low and the PCM senses a low signal voltage. The PCM uses the signal circuit of the fuel level sender in order to calculate the total remaining fuel percentage in the tank. The PCM sends the fuel level percent via the class 2 serial data circuit to the instrument cluster in order to control the fuel gage. The fuel level information is also used for misfire and EVAP diagnostics.
Install a scan tool.
Turn the ignition ON, with the engine OFF.
With a scan tool, observe the Fuel Tank Level Remaining parameter in the PCM data list.
Does the scan tool indicate that the Fuel Tank Level Remaining parameter is less than the specified value?
No DTC'S - diagnostic trouble code's stored ,use this diagnostic procedure
Fuel Gage Inaccurate or Inoperative
• Refer to Fuel Level Specifications in order to verify the correct fuel level sensor readings. The Fuel Tank Level Remaining parameter is available in the scan tool in the PCM data list.
The numbers below refer to the step numbers on the diagnostic table.
This step tests for a high resistance in the signal circuit and the low reference circuit of the fuel level sensor.
DTCs will be set in the PCM when you perform this diagnostic table.
Schematic Reference: Instrument Cluster Schematics
Did you perform the Instrument Cluster Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - Instrument Cluster
Connect the J 33431-C Signal Generator and Instrument Panel Tester between the signal circuit of the fuel level sensor and the low reference circuit of the fuel level sensor on the male terminal side.
Turn the ignition ON, with the engine OFF.
Important: Verify the J 33431-C resistance settings with a DMM.
Vary the resistance on the J 33431-C from 40-250 ohms.
Refer to Fuel Level Specifications in order to convert from resistance to fuel gage display.
Does the fuel gage display the correct fuel level?
the fuel sending unit is probably stuck and need to replacing. common problems to many oldervehicle it tend to read sometime correctly and sometime not at all. the sending unit will be in your gas tank.
Reversing polarity at the battery is a very bad thing and can cause a host of unpredictable problems. You are lucky that you didn't fry the alternator diodes (the battery is charging, I hope). Each of the problems you describe will have to be treated separately. 1. try replacing the turn signal fuse and flasher unit. 2. fuel gauge has a delicate resistor... probably the easiest fix is to replace the instrument cluster. 3. Heater blower fan has a resistor pack for different fan speeds, this may be replaceable, otherwise a new blower assembly may be the best way to fix it. Hope this helps