Battery drain on cold start
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Freshman User
Joined: Nov 2010
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Battery drain on cold start
New glow plugs
New injectors
New batteries
New relay
New air filter
All work performed at a reputable diesel mechanic.
Still won't start unless plugged in.
Ideas, thoughts?
New injectors
New batteries
New relay
New air filter
All work performed at a reputable diesel mechanic.
Still won't start unless plugged in.
Ideas, thoughts?
Fleet Mechanic
Joined: Oct 2017
Posts: 1,704
Likes: 164
From: Southwest Ohio
Does your mechanic not know how to use a DVM? It's not that difficult to measure amp draw at the fuse box, which will allow you to isolate which circuit has the excessive draw and then track it down from there. If there's no draw he can then use the DVM to measure voltage drop during cranking to see if it's a bad ground or bad cable.
-- Dave
-- Dave
Moderator
Joined: Aug 2002
Posts: 6,100
Likes: 380
From: Southern California
1st fully charge the battery and perform a load test; second if all is ok, connect a multimeter to the ground terminal in parallel mode...if you have a drain, you will see a voltage reading...more than .05..... begin by removing either the relays and/or fuses one at a time looking for the voltage to drop...when it does, you found the circuit with the problem.....this can be caused not only by a "device' but a bad relay as well.
Tuned
Joined: Jan 2019
Posts: 329
Likes: 79
From: Southern California
You getting battery drain at startup? If it is the glow plugs will quickly drain low batteries.
And it takes more then one hour to fully charge the batteries, try over night.
And it takes more then one hour to fully charge the batteries, try over night.
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Freshman User
Joined: Nov 2010
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Yes it's draining at startup. The go plugs run their cycle and the battery gauge indicates a full charge. The batteries charge very quickly they're brand new. Even the old batteries charged quickly but I replaced them to eliminate them as a possibility.
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Tuned
Joined: Jan 2019
Posts: 329
Likes: 79
From: Southern California
Even after the glow plug wait to start light goes out the glow plugs are still on especially in a cold climate. If you have the single alternator it cannot over come the amp draw of the glow plugs. Put a DVM on your batteries at startup and watch the voltage drop each time the glow plugs cycle on.
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