Electrical issues, codes 135,141,155,161,340,443

JBEAVES

MEMBER
2002 FORD F-150
4.2L
6 CYL
2WD
MANUAL
210,000 MILES

This is an interesting problem. Purchased this truck used. It idles fine, surges when accelerating, loses power up hills. Replaced plugs, wires, checked coil, checked and cleaned main ground, cleaned MAF with spray cleaner. Intermittently, power at dash lights when key is turned but wont crank, checked ignition switch and movement of actuator "shaft". Theft light slowly blinking. Replaced fuse#3 obd port. Also blowing fuse #23 engine compartment. Codes, 135,141,155,161,340,443. Any ideas would be appreciated.

5 Replies

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

You are blowing fuse #23 in the Battery Junction Box because you have a short to ground somewhere in the circuits that the fuse protects. Let's start with the blown fuse then we can move on to the Direct Trouble Codes (DTC)(s). In the diagrams down below I have included a diagram with callout of the Battery Junction Box as well as wiring diagrams for the engine performance of your vehicle. The set of wiring diagrams will have all of the circuits that fuse #23 protects(available on the callout). I have also included a guide for finding shorts to ground in an automotive electrical circuit. You will need to use a Digital Multi-meter (DMM) to find the short to ground, so I have included this link below for you to go to if you are unfamiliar with how to do so.

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Please go through these guides and get back to us with what you are able to find. We will tackle the DTC's then.

Thanks,
Alex
2CarPros

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Sunday, August 18th, 2019 AT 8:48 PM

JBEAVES

MEMBER
3 POSTS

Thanks for your quick response and the wiring diagrams. I will get back in touch when i've had a chance to do more troubleshooting.

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Monday, August 19th, 2019 AT 6:52 AM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

SCWICKEDSTANG is one of our best! Please let us know what you find. We are interested to see what it is.

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Thursday, August 22nd, 2019 AT 12:24 PM

JBEAVES

MEMBER
3 POSTS

Okay, slowly but surely, but don't call me Shirley. Having to work on it when I can. Checked connection, cleaned, lubed and replaced springs on clutch home position switch, solved intermittent non starting problem. Applied Permatex flow-able silicone around wind sheild for leaks. Seems to happen a lot on these models. Oh yeah, replaced fuel filter earlier, looked like it had never been replaced. Traced wiring to oxygen sensor with a bare wire. Did a temporary tape job but still blowing fuses. Will check back when I have more time.

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Sunday, September 1st, 2019 AT 7:55 AM

KEN L