1998 5.9l 176xxxk
today my truck randomely stoped starting. when i turn the key my fuel pump primes and all my lights come on, but the starter soleniod wont even click. if i jump out the starter the truck starts and runs perfectly fine. however, i get an air bag light on my dash and my speedometer wont work. my battery is fully charged. my asd relay is good and so is the starter realy. any help is greatly apriciated.

 

ignition switch...

 

Possible failing ignition switch? Will the heater blower work when it fails to start with the key?

 

no it doesnt work

 

Then I would look VERY hard at the ignition switch.

 

would an ignition switch cause my speedo to stop working and do you know if its a dealer only part?

 

i know this is prolly a dumb question but is the ignition switch the same as the key switch

 

Not sure on sourcing.... but.... a fair few systems draw power from the same terminal that the starter relay does. (blower relay, for example. ) So, if that terminal ISN'T getting power, then, neither are some of the sensors that the failing systems depend on.

As a test, when the truck fails to start, check for power on pin 5 of the ignition switch connector. Should be 12 volts. (with ignition in Run position.)

Yeah. The key operates the ignition switch, gotta disassemble the steering column a bit to get to it.

 

I am going to go check that in just a minute. ...Yay me

 

there is power at pin 5 (black and white wire)with the key in the run postion, and if i turn it to start power goes away