You just Remove and Replace the Old Coil, They are a Direct Fit
SOURCE: 1999 Grand Cherokee Radio Wiring Harness Diagram/Color Codes
Go to www.installdr.com and search through the diagrams in there, the site is easy to use, all you need is acrobat reader installed on your computer to use the site, it has a full explanation on every wire color and what it is
SOURCE: HEI Coil is burning out
If the Electrical system is grounding out, particularly the hot lead to the coil. then you will fry coils. Check your Positive leads at the fuse box for continuity to ground. 1st check the ignition wire i.e. red wire going to your coil. Disconnect the ignition wire from the coil or distributor (depending where your coil is located). If it has continuity to ground, then go to your fuse box and pull out all your fuses and test each terminal for continuity to ground until you find which circuit is grounding out and polluting the rest of the positive circuitry. If it is only the ignition hot wire then you know that is where the problem is. If it is coming into the fuse block from another positive source, isolate that source by not allowing it to come into contact with + current.
SOURCE: wiring an hei distributor
You shouldn't need a spark box because thee coil is located in the dist. cap. You need to run a 12v switched power source to the side of the dist. cap that is marked dist. if it isn't maked it is the term. that is on the front right of the conector pad. the one on the left is for hooking up a tach.
SOURCE: two wires go from distributor (350 chevy) to HEI
the heaver guage wire will be a power lead, the other if cheched while crancking will be a ecm pulsation for coil
SOURCE: Break Light wiring diagram for 1998 dodge ram 1500
haynes repair manual has a brake switch diagrame
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