OBD1 Help

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Jun 6, 2019 | 10:13 PM

Ironman1257

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Beginning Member

Joined: May 2019

Posts: 10

OBD1 Help

So I bought an OBD2 scanner, and an adapter to plug into my '92 Blazer. However when i plugged everything in, the scanner didnt power on. Is there a common issue here??

Jun 7, 2019 | 01:14 PM

Tom A

BF Veteran

Joined: Jul 2013

Posts: 2,422

From: Northeastern Nevada, USA

Could be a blown fuse. Usually, the dome light is on the same one. Maybe the 12V outlet/lighter, too.

Jun 7, 2019 | 01:30 PM

Ironman1257

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Beginning Member

Joined: May 2019

Posts: 10

I bought a fuse kit and just started replacing all the bad fuses, so I wouldn't think it's that. Although my radio suddenly doesn't work either

Jun 7, 2019 | 01:33 PM

Tom A

BF Veteran

Joined: Jul 2013

Posts: 2,422

From: Northeastern Nevada, USA

If you have a 12-pin connector, you'll have to supply external power. If it's an 18-pin, use a voltmeter to check the B+ terminal for voltage.

Wiring diagram

Jun 7, 2019 | 01:47 PM

Ironman1257

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Beginning Member

Joined: May 2019

Posts: 10

So, I'm getting power to the connector, around 11v, but it's not turning on the scanner

Jun 7, 2019 | 11:25 PM

odat

Super Member

Joined: Sep 2013

Posts: 1,150

From: wyoming

The OBD2 systems supply power to the reader - OBD1 does not
Most code readers need a external power supply as in battery's for OBD1
Mine reader has too have 3 AA battery's added for OBD1