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#1
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glow plug light meaning?
if the glow plug light on dash comes on does that mean the glow plugs are ok or could they still be faulty...thanks..
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#2
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What car/engine?
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#3
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Still could be something wrong. Best quick check is to disconnect the relay plug and read each plugs resistance. Thats if your relay is mounted in the engine compartment.
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#4
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1982 non turbo 300d euro....will check glow plugs...thought light wouldn't function if plugs were bad...car not firing up in cold weather...will check valve adjustment
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#5
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Unless the Euro is different, the light could function normally with one inoperative glow plug. More than one inop plug should cause the pre-glow light to not illuminate. This, of course, assumes that the fault detection circuit is operating normally.
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#6
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The light will still come on with some plugs bad. I had one bad one (open) a couple months ago and the light still came on as normal. When I first bought the car it had two bad ones (open) and the light would come on but go off again quickly.
I've also seen a 7.3 IDI International do the same with four bad ones.
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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar. 83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles 08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles 88 Jaguar XJS V12 94,xxx miles. Work in progress. |
#7
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the light comes on for about 10 seconds..it's easily below freezing out
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#8
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i read that they could all be out and the light would come on
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#9
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That is true. The fault detection balances the current between the number one plug and plugs 2-5. If they are all out, there is no imbalance.
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#10
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But if they are all out, I wouldn't think you could start it at all.
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Len '59 220S Cabriolet-SOLD and living happily in Malta '83 240D 351,500 miles original owner-SOLD '88 560SL 41,000 miles - totaled and parted out https://sites.google.com/site/mercedesstuff/home '99 E300 turbo 227,500 miles '03 SLK320 40,000 miles - gave to my daughter '14 Smart electric coupe 28,500 miles '14 Smart electric cabriolet 28,500 miles '15 Smart electric coupe 28,000 miles |
#11
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newpastlife,
U can put a voltmeter or 12v test light on a GP terminal see if it is getting voltage when U turn the key switch to the GP position. P E H |
#12
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You can also check resistance with an OHM meter. Less than one is good. As you can see I need to replace these, I now have them. Started this morning tho, upper twenties.
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83 SD 84 CD |
#13
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Too Many,
U will get more accurate readings if U get a bananna plug test lead for your ohm meter to plug into the terminal holes of the GP cable and an alligator clip for the ground test lead. A GP that reads 1.7 ohms is probabaly good. What did the other GPs read in ohms. P E H |
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