97 f150 4x4 off road: is there a diagram for doing a continuity test for my junction box fuse panel? showing continuity from fuses to pins on the back or from pin to pin, numbered, etc?

should I be getting continuity between fuse #23 and the top pin in the first column in the left hand (as you look at it from the back) cluster of pins?

 

What is your problem? You could be seeing continuity on the ground side. Are you blowing a fuse? What does the fuse power?

 

Problems: no turn signals, but hazards work; 4WD will not engage; the fuse shows continuity and hot in the run position. Fuse #23 powers 4WD clutch relay, electronic flasher, 4WD/2WD vacuum solenoids, and trailer tow battery charge relay.

 

You will have continuity, try testing to see the amperage between the blades of that fuse slot. Does the fuse blow as soon as you turn the key on? Maybe try pulling the turn signal relay. Chances are there is a broken wire somewhere.

 

I'm sorry, you asked but I did not mention that I am not blowing fuses. The Wht/Blu wire which plugs into the cluster of pins/blades on the back of my junction block/fuse panel, runs from the fuse panel to the blower/flasher relay block. When I do a continuity test on that wire from cluster plug in(unplugged) at the back of the fuse panel to the plug in(unplugged) at the relay block, I show continuity. When everything is plugged in, I show hot at the fuse, in the run position, but no heat at the flasher relay block coming from that wire. The pin/blade on the back of the fuse panel that the wire plugs into shows no continuity with fuse #23. I'm not sure if it is suppose to at rest(isolated). Hence, I was looking for a possible diagram that would show continuity tests from fuse positions on the front of the fuse panel to the respective pins/blades on the back. Whew.

 

The pin on the bottom of the fuse panel is #9 where Connector C243 plugs in. The W/BL circuit is protected with fuse #23. The circuit is hot in the run position. If I do a continuity test(bench test with fuse panel in hand) between fuse #23 and pin #9, am I supposed to show continuity? I'm trying to verify that the fuse panel may be defective in that circuit. As of now, there is no continuity. Thanks in advance.

 

It's sounds like you need a wire diagram. Are you getting power to fuse #23 with everything together? If so, can you trace that to I think you said it goes to a relay- is it getting power to the relay? Continuity doesn't show much but If you have 12 volts to the relay that says something. Put it all back together and follow the path of voltage. You know what I'm sayin?

 

Thanks for responding tansupercrew,
I am getting power to fuse #23, however, I am not getting power to the flasher W/BL wire which connects to pin #2 in the flasher. The schematic shows pin #2 as an ignition 12V (run). When I unplug C243(on the bottom of the fuse panel) and do a continuity test on the W/BL wire from C243 to W/BL connector at the relay, I show continuity in the wire. It seems that I am not getting power from fuse #23 to pin #1(which connects to W/BL wire in C243)on the bottom of the fuse panel. Unfortunately, my EVTM does not have component testing for the junction box fuse/relay panel.

 

tansupercrew,

I owe you some kudos. When you suggested doing an amperage test on the fuse blades, a light came on. I wondered if the problem may be that the male fuse blades were not mating properly with the female receptacles for the fuse in the fuse panel. Therefore, that would cause lack of continuity through the fuse panel to the respective pin on the bottom. So I cut a fuse blade off a spare fuse and wedged it between the plastic insulation on the fuse and the body of the fuse panel and then checked for continuity to the pin on the bottom of the fuse panel. The VOM showed continuity. I put everything back together and everything works. Seeing that the fuse panel was manufactured 04/15/1997, I may spring for a new one with no wear and corrosion. However, without your response and suggestion, I may still be scratching my head. So, once again, many thanks for your effort. You've earned some board cred with me. Wolvereel.

 

Glad to have helped, you were starting to lose me with the connector numbers and fuse numbers, I had to draw a little picture just to follow your description. Well done.