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Relay Info and another thought 200 1981

uid 18083's pic
posted by  lucid on  Thu Jun 3 05:18 CST 2004
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

FI Relay should be within 6" to 8" of driver's left knee, maybe tucked down behind side panel. Rectangular (not the square Bosch "cube"), with 6 terminals—2 rows of 3. The W/R wire to 31b will be a clue.

Plastic case could be Green, Brownish Red, or Black. Real old ones were aluminum-cased.

Also check Fuse 13 for intermittent contact. This F13 voltage to relay terminal 15 AND the Coil pulses to 31b are BOTH required.

ALSO — How did you jumper the pumps? F7 to F5 will run the pumps, but NOT the Lambda circuits (O2 input, Freq Valve etc). So maybe my pointing to ignition wasn't valid.
Voltage jumper from F7 to F5 duplicates Relay output 87, but Lambda needs voltage from relay 87b, as other poster said below.

Pull relay connector and jumper 87 (Y/R) to 87b ( Blue), then try starting with F7 - F5 jumper. (Put jumper to LEFT side fuse contacts to replicate normal voltage path/current flow)

--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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