1972 F250 wont crank when atempting to start - Ford Truck Enthusiasts Forums

1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

1972 F250 wont crank when atempting to start

Thread Tools Search this Thread
Old 08-14-2012, 07:20 AM
ford collector ford collector is offline
New User
Thread Starter
Join Date: Aug 2012
Posts: 7
ford collector is starting off with a positive reputation.
1972 F250 wont crank when atempting to start

Hello, when i got the truck from previous owner he said that the voltage reg was bad so i replaced it and still nothing no lights no cranking ,radio, nothing i know the battery is good it starts my 75 f250 fine when i tried crossing terminals on the starter solenoid it would click and grind i had a spare starter the exact same so i put it on and it would crank but only by crossing the terminals i thought mabey the ignition switch so i replaced it i can smell gas when i pump the pedal but no fire i am out of ideas except replacing the solenoid go over all wires and replacing plugs wires cap rotor pionts condenser and coil also im going to get the alternator tested im out of ideas any info will help thanks.
Reply With Quote
Old 08-14-2012, 11:28 AM
MIKES 68 F100's Avatar
MIKES 68 F100 MIKES 68 F100 is offline
Join Date: Jan 2011
Location: Antelope Valley ,CA
Posts: 4,326
MIKES 68 F100 has a good reputation on FTE.MIKES 68 F100 has a good reputation on FTE.MIKES 68 F100 has a good reputation on FTE.
bench test starter with jumper cables , you could have a bad battery cable check all connections and clean them .
Reply With Quote
Old 08-14-2012, 08:32 PM
Wildcat455 Wildcat455 is offline
New User
Join Date: Dec 2005
Location: Phoenix, Az
Posts: 19
Wildcat455 is starting off with a positive reputation.
You may have multiple problems, but you can get through them. I hope you have a voltmeter and know how to use it. It will save you TONS of $$ better spent on BEER when you get it running right!


Ok, Before you start throwing parts at it, try this:

You say you replaced ignition switch, so I assume it it good. Do you have ~12VDC at the Ignition switch? How about the coil? If so good. (It's OK if it's a little less or more than 12VDC...) If not, possible wiring harness, or a fuse. (Randomly, and just for fun, check the connections including ground to your alternator... Clean them, if nothing else, it'll help you charge the battery when you get it running.)

If you don't have ~12VDC at the Ignition switch, then the connection from the battery to the solenoid, or the wiring to the Ignition switch from the solenoid battery connection is bad. Clean all connections at those terminals first, before suspecting the harness. Got ~12VDC yet?

If you have ~12VDC at the switch, and still nothing in the cab works, look to fuses or other wiring issues. Address it later once you get it running.

Continuing on, do you have ~12 VDC at the Solenoid connection from the key switch when you turn your key all the way to start? (This would be one of the little wires on the solenoid, not the big power wires coming from the battery on one side, and going to the starter on the other.) If not, and with a recently replaced key switch, I'd say problem with the wiring harness coming from your key switch to your solenoid, or solenoid ground. The solenoid grounds through the 2 bolts to the fender well. Clean those connections to bare metal first and try again. Still No crank or start?

If you got ~12VDC at the solenoid from the key switch, then disassemble the high power connections on both sides of the solenoid and at the starter, and wire brush them, re assemble and try again. If still no crank, replace solenoid. Try again. If crank but no start, measure for ~12vdc at your coil while cranking. If ~12VDC is there, clean/check - (Negative) side that goes to distributor for problem. While cranking, with High tension wire from coil removed AT THE DISTRIBUTOR and placed in close proximity to ground, you should get hot blue spark. If not, or spark is weak, could be your coil or improperly set points, or bad condenser. Check points adjustment first, replace condenser second, then coil. You should be checking to see if it will run in between each thing you do. (Gotta save that BEER $$)

Before you got through all this, you should have fixed your problem. I would suggest even after the problem is fixed that you clean connections as that seems to be a big cause of allot of headaches. Think of it as future piece of mind.

Enjoy your BEER!

Good Luck!
Reply With Quote
Old 08-14-2012, 09:49 PM
ford collector ford collector is offline
New User
Thread Starter
Join Date: Aug 2012
Posts: 7
ford collector is starting off with a positive reputation.

Ya i do have a multimeter i will go thru it thanks i will let you know after tonight when i work on it.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
1989 7.3 Starter Solenoid / Ignition switch?? Littlecocheese Pre-Power Stroke Diesel (7.3L IDI & 6.9L) 4 02-02-2014 11:44 AM
Help my F250 start saltydog73 1987 - 1996 F150 & Larger F-Series Trucks 1 12-31-2006 12:42 PM
Starter solenoid staying engaged,fusing closed ironelk Electrical Systems/Wiring 7 12-03-2005 10:29 PM
79 f150 won't start, solenoid / relay problem? ToolDude 1973 - 1979 F-100 & Larger F-Series Trucks 17 04-22-2004 02:37 AM
87 F-250 4X4 460 starter wont stop starting! BROCO Electrical Systems/Wiring 2 02-05-2004 08:15 AM

Go Back   Ford Truck Enthusiasts Forums >

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -5. The time now is 11:55 PM.