Tps
It's meaningless.
If you want to diagnose something on an '87-96 F150, buy a Haynes manual, read it (cover-to-cover at least once), and follow the instructions.

(phone app link)
If you want us to help, put ALL the truck's details into your signature as this caption explains:

(phone app link)
If you want to diagnose something on an '87-96 F150, buy a Haynes manual, read it (cover-to-cover at least once), and follow the instructions.
(phone app link)
If you want us to help, put ALL the truck's details into your signature as this caption explains:
(phone app link)

