No start using key
Thread Starter
|
5th Wheeling
Joined: Apr 2023
Posts: 49
Likes: 4
No start using key
1991 Ford f350 will not start using the key.
I've replaced the ignition switch and starter solenoid. Verified the linkage to the ignition switch is moving and actuating all positions. Jumped pins 32 and 32 together on the neutral safety switch. I can start the truck using a screwdriver to short the starter solenoid. It stays running and runs like normal. Im not sure what else to check. Any help would be appreciated.
I've replaced the ignition switch and starter solenoid. Verified the linkage to the ignition switch is moving and actuating all positions. Jumped pins 32 and 32 together on the neutral safety switch. I can start the truck using a screwdriver to short the starter solenoid. It stays running and runs like normal. Im not sure what else to check. Any help would be appreciated.
Tuned
Joined: Sep 2024
Posts: 488
Likes: 122
From: Ougadougou
Are you getting any voltage at the small wire that should' be connected to the upper little post on the starter solenoid? With key on "Start" there should be 12v at the little trigger wire. I've knocked that wire off before and suddenly the key wouldn't start the engine.
Thread Starter
|
5th Wheeling
Joined: Apr 2023
Posts: 49
Likes: 4
Are you getting any voltage at the small wire that should' be connected to the upper little post on the starter solenoid? With key on "Start" there should be 12v at the little trigger wire. I've knocked that wire off before and suddenly the key wouldn't start the engine.
Fleet Owner
Joined: Jul 2006
Posts: 20,378
Likes: 845
From: Mi'kma'ki
That verifies it. Bad solenoid. When a good solenoid gets power to the S (start) terminal (when you turn the key all the way forward), it's supposed to internally connect the two main terminals (that you jumped together) and turns the starter.
Thread Starter
|
5th Wheeling
Joined: Apr 2023
Posts: 49
Likes: 4
Thank you for your help. Did some testing and the solenoid was not grounding through the case added a ground to the other small post and it starts great now.
i ain't rite
Joined: Mar 2005
Posts: 65,564
Likes: 5,601
From: Marlboro Mental Hospital.
the only difference between the two is starter relay is case grounded, glow plug relay is internal grounded through the other small terminal.
Thread
Thread Starter
Forum
Replies
Last Post
markeyd
1961 - 1966 F-100 & Larger F-Series Trucks
6
Feb 21, 2016 07:32 PM
rlester
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
12
Mar 12, 2007 01:20 AM
