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01-11-2015, 03:35 PM | #1 | |
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Join Date: Mar 2012
Location: Chandler Arizona
Posts: 104
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Re: 81 c30.....5.3
Quote:
Check 20 and 57 for constant and that's there. |
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01-11-2015, 03:44 PM | #2 |
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Join Date: Jan 2015
Location: Columbia, KY
Posts: 26
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Re: 81 c30.....5.3
Now check the pink wire at the White color coil connector on each bank. Also check the pink wire on all of the injectors,
Then check the dark green/white wire in PCM Red connector Cavity 9 for the fuel pump relay signal. The PCM outputs a + signal on this wire. You should use a Digital Multi Meter when testing circuits on a fuel injection harness. You could damage the PCM if you are not careful. Bill |
01-11-2015, 04:04 PM | #3 | |
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Location: Chandler Arizona
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Re: 81 c30.....5.3
Quote:
I don't have a red connector to my PCM only a blue and green. I think green connector pin 9 is for the fuel pump correct? |
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01-11-2015, 04:16 PM | #4 |
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Join Date: Jan 2015
Location: Columbia, KY
Posts: 26
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Re: 81 c30.....5.3
I thought you were DBC. Yes, since you are DBW you will check the Green Connector. Each injector should have 12v at the pink wire.
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01-11-2015, 04:17 PM | #5 |
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Location: Chandler Arizona
Posts: 104
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Re: 81 c30.....5.3
Green connector on switched 12v has nothing, right as the turn the key the my meter jumps a few and goes to zero. And the pink wire on each injector does not have 12v on switched ign.
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01-11-2015, 04:21 PM | #6 |
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Location: Chandler Arizona
Posts: 104
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Re: 81 c30.....5.3
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01-11-2015, 04:55 PM | #7 |
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Join Date: Jan 2015
Location: Columbia, KY
Posts: 26
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Re: 81 c30.....5.3
Ok, now you will want to check for Ground at the PCM, and power and ground at the tac module connector.
On the PCM Connectors cavities 1 and 40 should have a good ground on BOTH connectors. On the TAC Module Connector Cavity 7 should be Switched Ignition, and Cavity 15 should be Ground. Also, Have someone crank the engine while you check for power at Green 9 |
01-11-2015, 07:10 PM | #8 | |
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Join Date: Mar 2012
Location: Chandler Arizona
Posts: 104
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Re: 81 c30.....5.3
Quote:
TAC. Module 7 is good with switched 12V and 15 shows ground with test light. |
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01-11-2015, 07:12 PM | #9 | |
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Location: Chandler Arizona
Posts: 104
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Re: 81 c30.....5.3
Quote:
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