Tech, Repairs, Upgrades > Capri XR-2 89-94

Ignition switch problem.

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jman2030:
Where under the dashboard is the ignition switch diode located? Because my Capri will not start now. And I read that is a primary cause.

Rocketman:
Where did you read that? Just curious, can't remember a diode being a problem.
What are your symptoms? Crank/no start/no tach bounce?

jman2030:
Just installed a new clutch. But before that when I turned the key to the full off position it would continue to run like I never shut it down. As I was looking for the answer. Cane across Modern Capri Parts.biz. According to what I read. What was going on was a typical symptom of a ignition switch diode going bad. So now after I have installed the new clutch and reassembled everything. I can crank it over. But, it's not starting because even when I just turn the key to the run position the check engine light doesn't even come on. And I already tested the bulb and it light up. So right now I don't know if the ECM is even getting power to it at all. And everything else works like there's no problem. So I'm stumped.

boomingbeetle:
Given my own phantom electrical gremlin experiences... Are you 100% sure that you cleaned and re-connected all the ground straps on the trans and motor block?  Especially the ones at the thermostat?  Also, check to be sure you reconnected the plugs on the air box (coil and VAF).  Coil gives you spark, VAF turns on fuel pump.  Do you have other symptoms?  can you verify fuel pressure or hear the pump turn on, can you test for spark?

jman2030:
Yes I did all that. New fuel pump. New water pump and timing belt. Cleaned all the harness connectors with contact cleaner. Fuel pump comes on when it cranks like it's supposed to. Spark is good. Failed noid light test. And I didn't even come anywhere near the ECM at all. I was doing a clutch. Didn't even take the starter because of all the brackets around it. Battery was completely out of the car during the clutch install. Also installed a new ignition switch as well.

Supposedly this diode is in the ignition switch circuit. It controls one of the relays for the ignition circuit.

Here's the link to see what it looks like http://shop.moderncapriparts.biz/catalog/SearchResults.cfm

Also the relay in the cabin fuse panel. If that goes bad. Will that effect the ECM as well?

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