Re: radio does not work and all the instrument indicators...
Did you check for fuses , the radio and instrument cluster are tied in for illumination , check all fuses and if that does not work disconnect the radio and see if that is causing a short... they could have shorted out and you may have to replace the instrument cluster but you can get them online very reasonable
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It may be the sending unit in the tank that needs replacing. Here's how you can check: Turn the key on and disconnect the sender unit at the gas tank. Ground the sender unit's wire with a jumper wire from the truck's harness to ground. Watch the gauge. If the gauge on the dash is good, grounding the sender wire will cause the gauge needle to react and should move to full. This would indicate a new sending unit is required. If the gauge doesn't move when the sender unit is grounded, the gauge is bad and needs replacing. Pull the instrument cluster out to replace the gas gauge. Likely any old ford gas gauge might work-back then, there were not so many production changes.
There is a flotation operated sender inside the gas tank, which provides information to the gauge. Either your sender has died or become corrupted by taking on gas, or the gauge has died. Probably easier cheaper and faster to have the gauge checked out at a dealer than to pull the tank out. Might be a common problem on that model or year. Ask a dealer service department how much to figure it out.
The most likely cause is that the fuel sender in the tank is faulty or that the wiring to the sender is bad.
Less common causes are a faulty fuel guage or circuit in the instrument panel.
Test the sender as it is the most likely cause and easiest to eliminate.
First inspect all connections that are readily visible to insure that they are secure & free from dirt or corrosion.
Disconnect the fuel tank sender wire at the tank. The guage should continue to show full (ignition on). Ground the wire from the sending unit at the fuel tank to any good grounding point on the car. The gauge should go to "Empty". If it does this is a strong indicator that the sending unit is at fault.
the heater control head . remove it and look at the big connector to see which wire is starting to burn up.i had a 99 caravan and that was the problem,replaced the control head and worked perfect ever since
The fuel sending unit may be going bad and the wire harness in the unit may have a break in it or the wire harness from the frame to the gas tank may be bad and that's the easier one to replace, since it's around $15.00 from Auto Zone. You can try replacing the wire harness first frame to the top of the gas tank, or check the condition of the harness and look for corrosion or any other damages. Good luck and hope this helps.
It may be possible to get instrument cluster to do a self-test? If you want to try this to rule out instrument cluster.
Press and hold odometer reset button, turn key from off to run, run is where the dash lites come on. Any stored 3-digit codes will be displayed in the odometer vf display. The vf display will perform a sequential segment test. All indicators, data controlled, will illuminate. All gauges will cycle in 12.5% or 15% increments. The cluster will automatically exit self-test. The self test does not verify serial data stream. The cluster internally commands all non-hardwired gauges and indicators to operate. The fuel level sending unit sends info to pcm then pcm sends data to instrument cluster.
I don't know if that self-test will work on your vehicle? It won't hurt to try. If all the gages cycle except fuel gage, then I suspect the instrument cluster. You can call around different shops, get an estimate for the repair.