1997 Lincoln Mark VIII (crank no start) 4.6 l 130k

Car died while driving. I have replaced crank sensor cam sensor. The car has pats but key in run etc no flashing antitheft light. Coils and injectors have power key in run. No spark no injector pulse. Motor cranks. Checked all fuses ip and engine. Replaced pcm relay next to ip fuse panel. Swapped relays in engine compartment pcm relay. The pcm diode was swapped with an 03 e350 5.4 liter van. Diode is ok e350 runs. I put a test light from neg battery terminal on e350 to both connectors where pcm diode plugs in. On the e350 1 is ground the other is power test light glows (bright) and energises relays and fuel pump. On the lincoln same test energises fuel pump and relays very (dim) test light. The pcm diode has test pins lik a fuse I use a voltmeter and get nothing and a test light nothing key in run. Bad ground? Or a bad connection? No codes Thanks