HEI wiring?

Hi folks, A friend called today with a no start on an 89 caprice w\TBI. He had injector pulse but no spark (external coil HEI). He had already purchased a module and asked me
to install it. I found and replaced a badly burned rotor and cap, original at 140Kmiles. No spark at the coil. I went ahead and replaced the module because it was there. Still no spark. I'm a Ford guy and am very familiar with internal coil HEI but I've never had a chance to get to know this system. Could someone provide me with a wiring diagram or pinouts of the module and coil? I don't want to just throw parts at it. I just don't know where to check for voltage, ground,pickup pulse, etc. The 4 wire coil has me stumped :). Any input is appreciated. Thanks, Tom Adkins
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.