ACC Only Works Sporadically

[kyle d]

Recently, when I turn the key to ACC to work and listen etc. I dont hear the usual "click" of my relay to give power to the stereo. Tomorrow I'll post any codes if there are any. Hopefully i wont have to take whole steering column apart. If it helps any, one time i hopped in to leave work and I had no power. Luckily I bumped the shifter (was in park) and I had power again. Maybe loose connection. Thanks in advance!

 

[miesk5]

yo Kyle,

Do the self test for codes as you intended.

we're looking for DTC 67 Neutral Drive Switch (NDS) Circuit Open; "...This probably is indicating that the neutral drive safety switch is faulty and needs replaced. The purpose of the switch is to prevent activation of the starter (by creating an open circuit) when the transmission is in any gear other than P (park) or N (neutral."

DTC 67; "..One poss is that the NSS (or also called the MLPS) was ok...or connector was/is bad/corroded; or AC was left on, or transmission was in gear during the Self Test..." read more
Source: by miesk5 at fordfzone.com  http://fordfzone.com/topic/5375-1990-code-help/

Water Intrusion of Manual Lever Position (MLPS) also called Transmission Range (TR) Sensor TSB 95-2-12 for 89-94; Some vehicles may exhibit a shift concern and/or a harsh engagement concern due to water intrusion into the MLP/TR sensor and vehicle harness. There may also be a number of different DTC's along with those concerns
Source: by Ford via miesk5 at cc

IGNITION Switch Pin-Out Diagram & Continuity Testing (Logic Tables in 87-91 (from Factory Manual and the Ford Electrical & Vacuum Troubleshooting Manual (EVTM)
Source: by Broncobill78 (Dave) at Ford Bronco Zone Forum

http://broncozone.com/topic/14120-87-91-ignition-switch-info-troubleshooting-guide/

SEE PAGE 33-71-1;

Electrical Test

 

[Seabronc]

Sounds like a neutral Safety Switch adjustment is needed.