OK, coupla things, First - that guy on POWERSTROKEHELP (Bill Hewitt) is well know here as a complete IDIOT
I'm not saying his information is worthless
, he's got some helpful videos, BUT at the same time, he's also got some pretty ridiculous theories & misinformation so, just be careful with him...
Second, I'd closely monitor your voltage during this whole process and see if it's not a simple battery/connector issue.
Third, check those Fusible Links you see in your .pdf, here's my thread about them-> POTENTIAL ELECTRICAL CORROSION if your truck is like mine......
Let us know
Thanks for all the great advice NoRalph. That's disappointing to hear Bill Hewitt isn't so well respected- I thought I found a real gold mine of information when I found his site. But, respected or not, you're right that he does have some pretty useful info.
I was just able to look at the link to the thread you posted regarding the high current link connection that corroded on your truck. Some of what you described there may contribute to what I'm seeing. Here's what I found out about my erratic electrical problem...
My van has a "Power Distribution Box" in the engine compartment that contain high amperage fuses (20-60A) and several relays. I found that when I turn the key to power the accessories and get the flickering dash lights, the relays in this Power Distribution box are going NUTS! See here:
I was able to reproduce this behavior in an individual, otherwise functional, relay by gently touching it with a 12V lead, thereby making a weak connection to terminal 85 with terminal 86 grounded:
So I'm thinking that there is a weak wiring connection between the battery and the power to this box which seems to distribute power to the accessories.
At one point while I was fidgeting around in the Power Distribution box and checking the connections, the flickering dash lights problem stopped and everything seemed to be working properly. I tried to start the vehicle again (which was my original problem) and I got the same loud buzz / jackhammer sound. After that attempt, the flickering dash lights were back again.
Can anyone offer advice on how to troubleshoot the electrical symptoms I'm seeing here? Is there a sensor or voltage regulator that may be causing every relay in the Power Distribution box to sound like a round of applause?
Once I get this power gremlin fixed, I can get back to tracing why I can't get my engine to crank.