1988 Corolla / AE92 4AF to 4AGE Silvertop conversion - Toyota Nation Forum : Toyota Car and Truck Forums

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post #1 of 2 Old 04-19-2017, 10:03 PM Thread Starter
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1988 Corolla / AE92 4AF to 4AGE Silvertop conversion

I just got a Silvertop 4AG put in my corolla and now i gotta figure out the wiring harness . I have 2 out of the three ECU plugs intact , but the third one is gone and two of the wiring "branches" have been cut off . I'm trying to label individual wires but sometimes they don't match the wiring diagrams i've found online , or the diagram will tell me that two wires go into one spot or that two wires with the same color do different things . I'm really confused about what to do .
I'm pretty sure that the dash wires have been cut too .
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post #2 of 2 Old 04-25-2017, 01:41 PM
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You need to get the official FSM with wiring-diagrams for both your model-year car AND for the model-year Silvertop. You can get short-term membership and download from Toyota themselves. The TIS - Technical Information System. Download everything in one session and save for later.

I prefer this over books because i like to print out a fresh copy of the pages I'm interested in each time. I always get them greasy or make notes on them. Then I just toss it at the end of each project.

Also the electrical diagrams are much easier to read when printed on 11x17 paper. Then I'll trace the wires with coloured markers if necessary to make things easier to trace. Then figure out which wires on the engine-harness connects to existing wires on your car's harness.
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