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Q: glow plug relay not working on 97 ford f-250 diesel on 1997 Ford F-250

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
replaced relay with new one but not getting power to both big post
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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thats the problem, not the relay. you need to find out why the power side is not working. it could be a fusible link or broken wire. then you need to find out the reason for the failure or it will happen again.

Roy
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Besides taking it to a shop, you'll likely need the service book to test the wiring. If the relay isn't be activated when in KOEO position, then it's likely the ignition switch is bad. Always ensure perfect ground and power connections, typical domestic vehicle issues.
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