i found this in steve83's codes writeup i think it might be whats happening
4) Grounded STO/MIL Circuit
The processor controls the MIL by grounding the STO/MIL circuit (Pin 17). If this circuit shorts to ground, whether the processor is controlling it or not, the MIL will be lit. Starting in 1991, if the processor has lit the MIL, it will hold it on for a minimum of 10 seconds. If the MIL flashes quickly, the concern is probably the STO/MIL circuit shorting intermittently to ground.
so ill check the STO/MIL wires, STO is self test output but does anyone know what MIL is? thanks for the help
You cannot POSSIBLY have a code 33. Your 1994MY will only output three-digit codes, so you're likely misreading the output; it's probably code 111, meaning no DTCs present.
Just because you're not deliberately grounding the STO doesn't mean that the STO line isn't connected to ground elsewhere. I'd inspect the harness, starting at the EEC TEST connector, and work my way back down to the PCM. These trucks have a known problem in their harness in that specific area, but most of the time that will entail a PIP malfunction, causing stalling, bucking, no-start, etc.
MIL == malfunction indicator lamp == check engine light
Also; other issues that affect the PSOM are
TSB 95-5-21 Fuse "E" Inoperative - ABS Light On - Back-Up Lamps Inoperative - DRLs Inoperative - MIL On - Speedometer Inoperative
Publication Date: MARCH 13, 1995
LIGHT TRUCK: 1992-1995 BRONCO, F-150-350 SERIES
ISSUE: On some vehicles the HO2S wires in the 12A690 (subassembly of the 14B060 battery cable) harness may become chafed and the vehicle could exhibit any one of the following conditions:
ABS light on
Back-up lamps inoperative
Daytime running lamps inoperative
Trailer battery charge relay inoperative
MIL on, displaying Codes: 172, 173 or 41 for HO2S failure
Inadvertent PCM Self-Test
if i pull fuse E it stops pulling codes, so i think my HO2 harness may be chaffed and causing it to pull codes.
i unpluged the HO2 sensor harness by the headlight and its stopped. plug it back in and it started doing it again so its definetly in the HO2 sensor harness. ill probably get some battery cables made and find the short then
it was the HO2 sensor harness, down where it plugs into the O2 sensor some of the wires were melted together,
also heres a pic of my new battery cables. they're made with 2ga welding cable, a shop made them for $41