It seems than at Thu, 29 Nov 2007 09:10:59 -0500, Allan wrote: > "Dave H..." <[EMAIL PROTECTED]> writes: > > > Could you please elaborate on the resistance comment for testing > > glow plugs? is there a ohm reading that states the glow plug is > > acceptable and anything above/below that reading is a call to > > replace that glow plug? > > Resistance check alone is not enough to verify that the plug is good, > but it does seem to be a practical way to find those that are clearly > bad. > > IIRC they should measure about 0.6 or 0.8 Ohms cold. Much above that > and they are probably bad. But a correct resistance reading is only > an indicator, not proof, that the plug works properly in operation.
My preferred way to test glow plugs is with an ammeter. I have an old, aftermarket ammeter that reads +-60A that I have wired with test leads. At the glow plug relay, I pull the cover, clip one lead to the big fuse and touch the other lead to one wire at a time. With this method I can often even see the current decrease as the plug warms up. -- Philip _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
