Curley, My answers follow your questions....
On 01/02/2017 10:46 AM, Curley McLain via Mercedes wrote:
Larry, let us know if this recap is correct:
no start (without excessive cranking.) Correct
5 GPs changed with intake manifold off Yes
no start Correct
GP fuse found blown Yes
GP fuse replaced Yes
Was this fuse blown? Yes, as soon as the key was turned to
Pre-glow At that point I replaced the Relay and ut also blew a
fuse. In all cases when I mention "Fuse" I am talking about the 80A
Flat fuse on the bottom of the relay.
I believe you visually inspected the GP terminals, and non of the wire
terminals were touching. Is this correct? Yes, but some are very hard
to see. Obviously (I think) there must be a power cable touching
ground somewhere, right?
measuring GP relay plug to ground shows 0.0 ohms for all 5 GPs No, see
below:
Plug that connects to the GP Relay
0.0 to 0.1 X
0.0 X X 0.3 - 0.4
0.1 X X 0.3 - 0.4
(where 'X' equals a plug for 12v from the relay to the GP.)
next steps:
While I start the next steps, I'd like to hear what ya'll think about
the test results above....
1. with plug to GPs pulled off, turn on key and measure volts at all 5
output pins on the relay nefore the relay times out. (a helper to
turn the key is good.)
2. check meter with known good GPs to get an average reading for good GPs
3. Post the model number of your fluke so someone can figure out its
ability to read fractional ohms. *Fluke 77 Series III*
4. If test #1 appears good (+12v at all 5 terminals) then proceed
with Philip's ammeter test.
I would NOT bother taking the manifold off until these 4 steps have
been completed. *OK, I'll leave the bolt with damaged Hex as is for now.*
For future reference, next time you do a manifold off GP replacement,
start the car to test before you put the manifold back on. *How do I
start the car without the manifold?*
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