I lost juice to fuse # 20. Its not blown but has no power

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Apr 23, 2023 | 07:56 PM

97vanswap

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I lost juice to fuse # 20. Its not blown but has no power

My starter solenoid on firewall is not getting powerr to the skinny terminal all of a sudden. #20 fuse has no power ans isnt blown. Does the ignition switch send power to #20 or #20 send power to ignition switch?

Apr 24, 2023 | 06:09 AM

udsuth78

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From: Ponca City, OK

Does the PCM relay click when the key is turned to run? Maybe try swapping the relay with one of the others to rule it out.

Apr 24, 2023 | 08:18 AM

S-squatch

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On a 2000,
fuse 20 is powered by the ignition switch.

Apr 24, 2023 | 12:05 PM

97vanswap

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I dont know if it clicks my hearing not the best. Engine light comes on .If i jump fender mounted relay with screwdriver it starts. Wheres pcm relay? Under hood?

i used test light and big red wire under column has juice only when key turned to cranking position

Apr 24, 2023 | 12:21 PM

S-squatch

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What year are we talking about?

Apr 24, 2023 | 08:52 PM

97vanswap

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Dummy me .cant believe i didnt state year in thread title. Its a e1999 early 99 f250 automatic

Apr 24, 2023 | 09:38 PM

Kintla

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From: Montana

In e99 PCM relay is under hood in the power distribution box, #30.

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Apr 24, 2023 | 11:51 PM

udsuth78

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From: Ponca City, OK

Quote:

Originally Posted by 97vanswap

truck woulnt start if that pcm relay wasnt working?right its for computer?

Correct, PCM runs the show. We're just along for the ride. So an e99 auto w/ a no crank issue. Armed w/ this info I would ask will it start in neutral? Does the shifter feel sloppy at all? Have you checked the 2 screws in the end of the shift tube are tight? If it's not a loose shift tube then I would check the range selector plug down on the transmission. The connector is fairly exposed and easily get corroded and packed full of mud and crud. Even if it's not the culprit it's good preventive maintenance so you don't get bit later.

Apr 25, 2023 | 05:55 AM

#10

97vanswap

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Column is tight surprisingly like new. Truck cranks but not by turning key. Wont turn over in neutral either. Power goes to #20 before range switch right? No sense in chrcking range sensor if no juice to #20???

Apr 25, 2023 | 06:05 AM

#11

S-squatch

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Check ignition switch. You are talking about fuse 20 inside right?

Apr 25, 2023 | 06:36 AM

#12

97vanswap

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Yes #20. Im getting juice out of big red off switch wire when i turn the key. Is there another that shouldbe getting juice? Ill take poc of the red wire when i get home

Apr 25, 2023 | 07:34 AM

#13

S-squatch

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Fuse 20 is powered by red/light blue

Apr 25, 2023 | 08:31 AM

#14

udsuth78

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From: Ponca City, OK

Still a little fuzzy this am. so I took a brief stroll down memory lane on a no crank trouble I had no too long ago. Maybe you'll find something useful, I'm going to find a Monster and try waking up.

https://www.ford-trucks.com/forums/1...crank-hot.html

Apr 25, 2023 | 05:50 PM

#15

97vanswap

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Tuned

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Big red n blue doing right thing but where does it go after that?

https://youtube.com/shorts/2YioJW3Hr5g?feature=share

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I lost juice to fuse # 20. Its not blown but has no power

I lost juice to fuse # 20. Its not blown but has no power

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