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Wiring a glow plug relay

Installing a new Intake glow system on 76 Ford 172 diesel forklift. wiring with a push button.

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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fastboyz
  • 674 Answers

SOURCE: 1995 ford 7.3 litre diesel glow plugs

the best way i have found to test glow plugs is to disconnect the wire to the plug and get you 12volt test light and put your negitive lead of the test light on the positive battery cable so when you touch the test light to any ground the light will light. so now go check your glow plugs and if you have one that doesnt light the light its burned out.
good luck

Posted on Oct 27, 2008

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emissionwiz
  • 76070 Answers

SOURCE: 1995 Ford Bronco 172 EGO not switching lean bank1- jerks when run

Have u checked for vacuum leaks or poss leaking EGR valve? use carb spray around the upper intake manifold where it bolts to the lower manifold, spray vacuum lines where they are connected to the engine vacuum ports, the idle speed will change if u hit a leak, as far as the EGR valve goes see if it gets hot at idle, if it does it is leaking, if all checks ok replace the O2 sensor, but i suspect u will find a leak at the upper intake plenum.

Posted on Jan 10, 2009

  • 2 Answers

SOURCE: Problem with cold starting Ford 7.3L Diesel at > freezing temps

most likely the relay. its located to the left of the fuel filter( looking at the motor from the front). my experience is that they only last about 50,000 miles. the part costs about $20 at an navistar dealer. remove the cowl over the filter, disconnect the batteries(so you don't short the new relay out if you cross the polarity with a wrench) ,remove the four wires from the ceramic relay, un-fasten the relay from the base. reverse the process with the new relay. CAUTION; do not over-tighten the nuts on the wire studs, you could crack the ceramic relay.(iv'e done it) . hope this helps

Posted on Mar 18, 2009

  • 2002 Answers

SOURCE: need wiring diagram for 1990 ford f-250 4x4

If you are looking for a complete wiring harness diagram then faxonautoliterature has the original Ford service manual for your truck which has complete diagrams in it. If you are looking for components to check then Haynes Diesel Engine Repair Manual, part # 10330 has good diagrams of components and terminals pinpointed for testing purposes as well as the specs for those tests and a good diagnostic section. Hope this helps.

Posted on Oct 18, 2009

  • 37 Answers

SOURCE: working on 2006 dodge sprinter

I did this exact thing.. I see your date of posting is a while ago, however let me know how you ended up.. If you leave the battery connected while installing the relay you can short it out causing the problem all over again.. also there is a couple points that run along that wiring harness that are known to rub through.. let me know how you did!

Posted on Feb 03, 2010

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1 Answer

P138B - Glow Plug Control Module System Voltage Code on 2012 Ford F-350 diesel


Hello, Ruslan. The P138B error code usually means that the glow plug relay is faulty. I've also seen this code with faulty wiring harnesses . Hope this helps. Good luck and God bless.

Jun 03, 2015 | Ford Cars & Trucks

1 Answer

Where is relay for heater glow plugs located


The relay is in easy view on the top of the motor, a little to the right side (passenger side). You will see two identical relays. One of them, the large battery cable goes to the intake air heater. The other relay is for your glow-plugs.

Feb 14, 2014 | 1996 Ford F350 Crew Cab

1 Answer

Starting issue, I have a 1993 ford f250 7.3l pre powerstroke. I started the motor and it stalled out like there was a short, now when i turn the key my glow plugs do not fire and wait to start doesnt show...


On some Models the glow plug Relay does not have an integrated Power Relay. This means there is a second Relay before the glow plug Relay that feeds it power.

You should check the wires running to the glow plug Relay for power with the key ON. Check some other wires off of the Ignition switch to make sure your 20 year old Ignition switch is good.

There are some sites which show vehicle wiring. Autozone has a free section after Registering your vehicle but it takes a little sorting through the Help section. There should be a fuse to protect the above Relays.

Make sure you find the Diesel-equipped wiring circuit. Diesel ignitions are different from gas units.

Dec 27, 2013 | Ford F250 Cars & Trucks

2 Answers

2002 ford f250 7,3 diesel wont start


Sounds like it has too do with the glow plugs, and the Glow plug timer

Mar 14, 2013 | Ford F-150 Cars & Trucks

3 Answers

Expert van 2lhdi 2005 very poor starting in cold weather had glow plugs and relay fitted still no better. i only do 3000 a year and mainly short jouneys less the 5 miles. new battery last year. it does...


Firstly fit a manual overide to the heater plugs .relay -push button type switch -wire -connectors ,run a wire direct from battery to relay ,other side to heater plug relay output so it feeds all the heaters ,push button inside cab with a 12v feed from ignition switch running to relay then other side of relay to earth ,leave vehicle on charge often on trickle charge where possible ,also on a full tank of diesel put in a litre of petrol to stop diesel waxing up ,nice old rug or blanket over engine and it will first time every time ,only use the petrol when weather below minus 5c though ,great vehicles these peugeots but i do like my ford transit

Dec 19, 2010 | Peugeot 604 Cars & Trucks

1 Answer

2004 Hyundai Terracan, 2.5 turbo diesel, manual. Will not start cold. Once I get it started, it runs and starts perfectly, with some heat on the engine. Error Code P0110, I replaced the air intake...


right renew the glow plug timer/relay if you put a meter on the glow plugs when cold and turn ign on (with help) it should supply power for a about 20 secs ,time depends on outside air temperature ,if all else fails then do a colin --- use a push button switch,wired to a relay so glow plugs can be operated by pushing the switch which you will mount on the dash ,cant beat a manual overide system

Dec 14, 2009 | 2004 Hyundai XG350

1 Answer

Problem with cold starting Ford 7.3L Diesel at > freezing temps


most likely the relay. its located to the left of the fuel filter( looking at the motor from the front). my experience is that they only last about 50,000 miles. the part costs about $20 at an navistar dealer. remove the cowl over the filter, disconnect the batteries(so you don't short the new relay out if you cross the polarity with a wrench) ,remove the four wires from the ceramic relay, un-fasten the relay from the base. reverse the process with the new relay. CAUTION; do not over-tighten the nuts on the wire studs, you could crack the ceramic relay.(iv'e done it) . hope this helps

Mar 17, 2009 | 2001 Ford F250 Super Duty Super Cab

2 Answers

Ford Diesel glow plug relay goes out every year since 1993


The relay should cost about $35-45. A common Ford Starter relay can be used in place of the official glow plug relay. All that is required is a relay with terminals that have 5/16 or 3/8 terminals and can carry about 150-200 amps. When all 8 glow plugs turn on, it draws about 150 amps is all. There are two relays for the 7.3 diesel. One energizes the glow plugs and the other energizes a heating element in the air intake. That one is used to help eliminate white smoke while warming up and is turned on and off by the engine computer. It is usually only called for when the temperature is 20 degrees F or lower.
Otherwise only the glow plug relay works.

Dec 30, 2008 | 2001 Ford F350 Super Duty SuperCab

1 Answer

Diesel truck will not start


Maybee there is a short in the wiring...Or try replacing the glow plugs and glow plug relay..

Dec 07, 2008 | 1989 Ford F 350

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