2021年8月9日 · Fuse #28 serves ignition coils as you know and fuel injectors as @budwich stated and also C1-19 of the PCM. This fuse is energised through terminal C of the ignition switch once the RUN position is reached. PCM and BCM communications are established before the key even reaches the ACCY position.

2012年12月3日 · Figures. I start digging more and found that fuse #10, labeled PCM B (20A) is blown. Fuse #28 is PCM 1 and it is OK. If a PCM fuse is blown that can't be a good thing... Swapped it with a new one, turned the ignition, and the SES light came on for the test as it should. Tried to start, nothing. Released the key, no SES. Checked the fuse, blown.

2019年6月18日 · Checking the ECM-PCM Fuses at the Under-Hood PDC (Power Distribution Center) Next , The Mechanic Pulls the Cover from the PDC and using his “Scope-On-A-Rope” Power Probe expecting to see a Nice, Bright Light in the Probe Handle if these Circuits are operational. First… he probes FUSE # 56 (Key ON→ HOT in RUN or START).

2018年10月30日 · IIRC, the truck will still start without the mega fuse, just lights, dash and stuff won't work. Disconnecting the battery is too obvious and maybe even the most inept person could reconnect it if he spots it. Pulling the PCM fuses will make him think it's something more than just a dead or disconnected since lights and stuff will work.

2018年12月17日 · So PCM B fuse would only have power from from PCM itself, when the key is turned to prime the fuel pump and when the vehicle is running. That's where I'm stumped. I don't know if it's possible a bad ground somewhere, the PCM itself is bad, or maybe a bad connection at the fuel pump. The fuse slot pins didn't seem loose when I was probing them.

2011年4月7日 · From dash fuse 7, the circuit branches to the PATS module (above the fuse block), then goes thru the firewall to the PCM Power Diode, and continues to the noise capacitor, to all the coils. See if the capacitor looks burned.

2011年11月19日 · An overload in the PCM or intermittent short circuit to a grounded circuit or piece of sheet metal. I'd be taking the wiring harness covers off and inspecting the wiring very carefully between the fuse block and the PCM. Especially look for …

2018年1月25日 · The unpleasant part of that is that fuse 28 feeds 8 separate wires if I’m reading the schematic right. All injectors and all ign coils are powered from there. Checking continuity from the non-battery side of the #28 fuse terminal to ground shows there is a short... now I know what, time to find where.

2019年1月9日 · PCM fuse blew again I watched a video on youtube about some guy who says that most of the time is the fuel pump who shorts or the fuel pump cable So i removed the fuel pump relay ( micro relay 41 ), replaced PCM1 fuse ( fuse 28 ) and the fuse don't blow

2016年8月9日 · 2002 Taurus 30A PCM fuse blew Jump to Latest 5.6K views 9 replies 3 participants last post by lrodptl Aug 14, 2016