Please help, starting issues
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Freshman User
Joined: Sep 2015
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Please help, starting issues
1984 F150 4.9l will not even try to turn over. First time it happened, I replaced the ignition switch and it ran fine for 2 months. Having same problem so I've replaced ignition switch again and it tried cranking until battery died. Charged battery and now won't even try with the new ignition switch. Tried installing push to start button but I cant seem to get that to work either. Any advice.
Changed out as follows: Starter, starter cables, solenoid, solenoid cables, battery and battery cables, alternator, all belts, all hoses, heater core, water pump, thermostat, radiator and radiator clutch fan, spark plugs, fuel filter.
Changed out as follows: Starter, starter cables, solenoid, solenoid cables, battery and battery cables, alternator, all belts, all hoses, heater core, water pump, thermostat, radiator and radiator clutch fan, spark plugs, fuel filter.
Posting Guru
Joined: Jul 2015
Posts: 2,239
Likes: 5
From: Northeast Ohio USA
Given that you've addressed most of the electrical, have you looked at fuel delivery (or lack there of) ? As you may well already know...fuel,spark,air.....run. Is it a DSII Ignition? kinda assuming as mine....was.
Cargo Master
Joined: Mar 2008
Posts: 2,573
Likes: 207
From: Washington
Do you have a tilt wheel?
Do you have a volt meter? The coil positive should have voltage with the KEY ON.
Jim
Junior User
Joined: Sep 2004
Posts: 93
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I'm having this exact problem. Push to start will not turn the engine over for me. I'm going to replace the ignition switch and see how it works. I also bypassed the key by running a push button starter with one wire from batt(+) and other to solenoid.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Maybe the battery died? Is it an old one (5 years?)
They only have so many lives, draining them flat will do it, they may appear to charge up but choke when any sort of real load is applied.
Turn headlights on high. Look good? Then hit the starter. What do the headlights do then?
They only have so many lives, draining them flat will do it, they may appear to charge up but choke when any sort of real load is applied.
Turn headlights on high. Look good? Then hit the starter. What do the headlights do then?
Thread Starter
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Freshman User
Joined: Sep 2015
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Good luck, I don't understand why or how the ignition switch keeps dying or shortening maybe. Not sure if I can test them?
Lead Driver
Joined: Jul 2009
Posts: 6,477
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From: Sheffield, AL
Automatic or manual transmission? With manual, there is a safety switch such that the clutch has to be fully depressed for the starter motor to be able to be energized. If the safety switch goes out of adjustment or completely fails, the starter will be "dead".
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Freshman User
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automatic transmission, would the voltage regulator keep it from even trying to fire over?
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Cargo Master
Joined: Jan 2004
Posts: 3,118
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From: South Dakota
If you can't get the engine to spin over. The first thing to do is bypass as much as possible by bridging the 2 large posts on the fender mounted solenoid. Use something metal large enough to carry as much current as the battery cables.
Your automatic transmission also has what is referred to as a neutral safety switch, so the engine will only spin in park or neutral.
Your automatic transmission also has what is referred to as a neutral safety switch, so the engine will only spin in park or neutral.
Thread Starter
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Freshman User
Joined: Sep 2015
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If you can't get the engine to spin over. The first thing to do is bypass as much as possible by bridging the 2 large posts on the fender mounted solenoid. Use something metal large enough to carry as much current as the battery cables.
Your automatic transmission also has what is referred to as a neutral safety switch, so the engine will only spin in park or neutral.
Your automatic transmission also has what is referred to as a neutral safety switch, so the engine will only spin in park or neutral.
Cargo Master
Joined: Jan 2004
Posts: 3,118
Likes: 149
From: South Dakota
I'm not familiar with how the safety switch is set up on that truck, but it should have one. The fact that your gear indicator needle doesn't move may not even be related to the safety switch.
Moderator
Joined: Nov 2007
Posts: 22,415
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From: Denver Metro Area, CO
The gear indicator has nothing to do with anything - it's just an orange needle on a spring. The NSS is on the side of the transmission and is usually combined with the backup light switch; the red/light-blue-stripe wires are what you're interested in, they feed power to ther starter relay wtih the key in START and the NSS breaks that circuit if the transmission isn't in P or N.
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Freshman User
Joined: Sep 2015
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Yes the safety switch, if not operating properly, would certainly stop the engine from spinning over.
I'm not familiar with how the safety switch is set up on that truck, but it should have one. The fact that your gear indicator needle doesn't move may not even be related to the safety switch.
I'm not familiar with how the safety switch is set up on that truck, but it should have one. The fact that your gear indicator needle doesn't move may not even be related to the safety switch.
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
No, don't throw parts at it! Get yourself a meter or test light and test for voltage; don't throw parts at it and pray that something fixes it, that's just stupid... do some actual diagnosis....