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| | How to Diagnose the Ford Glow Plug |
 | | This system consists of a glow plug control relay (GPC) for 49 states or glow plug control module (GPCM) on 1999 and newer California emissions vehicles, eight glow plugs, a "wait to start" light, related wiring and the powertrain control module (PCM) to operate the system. |
 | | However, even though the light is off, the PCM will keep the glow plugs energized for a much longer time to reduce smoke and to improve cold driveability. |
 | | If the initial surge does not reach 160 amps, move the clamp to each glow plug supply wire at the valve cover connectors, cycle the key on and check for a minimum 20 amps each, replacing any glow plug that does not reach this spec. |
| www.asashop.org /autoinc/july2006/techtips.cfm (902 words) |
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