not cranking...???

[tturbonegro]

so i need a little help.. batteries are new, alternator is new...truck ran and started fine with everything new for a few days now is dead..not cranking like batt's are dead..volt meter shows 12.6 on both batteries...any suggestions? is dark and car is in garage so wont be able to mess with it till tommorow...i guess i have to check for draw by pulling fuses and see if meter reading changes? can i just put in a battery cut off switch that i can turn off the power to batteries so they cant be drained? also truck didnt have dome light bulb and was missing one door light bulb when i bought it..i replaced dome and both door bulbs..i..wonder if this was draining it and prev. owner removed it...also looks like under hood bulb has been removed...
00' 7.3 f350 sd xlt auto

[Deeslfxr]

Starter or connection on solenoid.

[cliford]

i once had a fuse link that blew in between the GPR and the solenoid on the passenger fender. it would drain the batteries if it sat and idled for an extended period

[tturbonegro]

thanks! ill try and hit it a little...so i should test he one in the fender? what should i get as a reading? also read there is a relay (307) ? in the fuse pannel ?

[tturbonegro]

truck is just dead..wont crank over..just clicks..it is 22 deg. out
both batt.'s are reading 11.66v (both batteries 4 days old, energizer 850cca)
alt. is reading 11.66v cant check it back to batt. cuz truck is not running. (alternator is 4 days old, motorcraft)
unlocks and locks strong, lights work, radio works..

starter soleniod...



starter itself...

[cliford]

you have 0 volts on the bottom post of the starter solenoid? the fuse link connects to that bottom post and goes to the GPR. i figured you would have power at the bottom post if you had power at the top one since they come from the same wire and then split at the wire. so i dont know. is that fuse link mushy or is it solid all the way throw. my guess is the starter solenoid is out. but thats a GUESS im not good with wiring problems just throwing ideas trying to help

[tturbonegro]

yep.weird....volt meter also shows a little low...but batts show 11.6

[Deeslfxr]

Batteries are dead at 11.6v. Try charging them and see if it will turn over then.

[dalton1]

Im gonna say starter solinoid. 11.6v should still crank it slow.

[tturbonegro]

how do i know if its the one on the starter or the one under hood? starter looks like its pretty old..could be original 100k mile old, so i would think i'd replace whole starter if its not the solenoid under the hood..