I have an 87 4 cyl. coupe that I installed an 89 5.0 engine & wiring harness in. Problem is that The alternator does not seem to be working properly. The light in the dash does not come on, but if you disconnect the battery the car will die. Engine is grounded. Their is one ground to the apron off of the harness to the alternator. Changed the alternator, same problem. I haven't checked for current flow, but at the firewall solenoid I only see 12.4 volts while the car is running. Also all fusible links seem OK (voltage across).
Any help would be appreciated. Scott
Any help would be appreciated. Scott