I purchased a 2002 F150 a couple of weeks ago and the air bag light flashes and then stays on. I ran into the guy I bought it from today and he said he was told it was the air bag on/off switch gone bad.

Well that is not my problem. This is.

My Dad has a 2001 Mazda B3000 (Ford Ranger). So I took the switch out of his truck to see if that would solve the problem on the F150. It did not and now after installing the switch (twice) back into the Mazda which was working perfectly fine it started flashing and won't go off.

It flashes 2 times then seven

Now I have my Dad mad at me.

So, any help would be appreciated.

Thanks,

 

I posted this on ranger-forums.com its good to keep around just in case the air bag system faults.
12=Low Battery Voltage
13=Air Bag Circuit Shorted to Ground
14=Primary Crash Sensor Circuit Shorted to Ground
21=Safing Sensor Not Mounted to Vehicle Properly
22=Safing Sensor Output Shorted to Battery Voltage
23=Safing Sensor Circuit Input Feed/Return Circuit Open
24=Safing Sensor Output Feed/Return Circuit Open
32=Driver Side Air Bag Circuit High Resistance or Open
33=Passenger Side Air Bag Circuit High Resistance or Open
34=Driver Side Air Bag Circuit Low Resistance or Shorted
35=Passenger Side Air Bag Circuit Low Resistance or Shorted
41=RH Primary Crash Sensor Feed/Return Circuit Open
42=LH Primary Crash Sensor Feed/Return Circuit Open
44=RH Primary Crash Sensor Not Mounted to Vehicle Properly
45=LH Primary Crash Sensor Not Mounted to Vehicle Properly
51=Air Bag Diagnostic Monitor Internal Thermal FuseFuse Blown Due to Intermittent Short to Ground
52=Backup Power SupplyVoltage Boost Fault
53=Primary Crash Sensor Circuits Resistance to Ground or Air Bag Diagnostic Fault

I have a few questions about your airbag light.

1. when you turn the key does the light come on at all then go off or does it not come on at all?
2. does it work when the airbag is turned on/off at the switch?

If it does come on then go out then the bulb is bad and you need to goto Radio shack and get a new one. It comes in a three pack and can be found here 12-Volt Colored Mini Lamps (3-Pack) - RadioShack.com

Hope this helps